1 /****************************************************************************** 2 * 3 * Driver for Option High Speed Mobile Devices. 4 * 5 * Copyright (C) 2008 Option International 6 * Filip Aben <f.aben@option.com> 7 * Denis Joseph Barrow <d.barow@option.com> 8 * Jan Dumon <j.dumon@option.com> 9 * Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd) 10 * <ajb@spheresystems.co.uk> 11 * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> 12 * Copyright (C) 2008 Novell, Inc. 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 26 * USA 27 * 28 * 29 *****************************************************************************/ 30 31 /****************************************************************************** 32 * 33 * Description of the device: 34 * 35 * Interface 0: Contains the IP network interface on the bulk end points. 36 * The multiplexed serial ports are using the interrupt and 37 * control endpoints. 38 * Interrupt contains a bitmap telling which multiplexed 39 * serialport needs servicing. 40 * 41 * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the 42 * port is opened, as this have a huge impact on the network port 43 * throughput. 44 * 45 * Interface 2: Standard modem interface - circuit switched interface, this 46 * can be used to make a standard ppp connection however it 47 * should not be used in conjunction with the IP network interface 48 * enabled for USB performance reasons i.e. if using this set 49 * ideally disable_net=1. 50 * 51 *****************************************************************************/ 52 53 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 54 55 #include <linux/sched/signal.h> 56 #include <linux/slab.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/netdevice.h> 60 #include <linux/module.h> 61 #include <linux/ethtool.h> 62 #include <linux/usb.h> 63 #include <linux/tty.h> 64 #include <linux/tty_driver.h> 65 #include <linux/tty_flip.h> 66 #include <linux/kmod.h> 67 #include <linux/rfkill.h> 68 #include <linux/ip.h> 69 #include <linux/uaccess.h> 70 #include <linux/usb/cdc.h> 71 #include <net/arp.h> 72 #include <asm/byteorder.h> 73 #include <linux/serial_core.h> 74 #include <linux/serial.h> 75 76 77 #define MOD_AUTHOR "Option Wireless" 78 #define MOD_DESCRIPTION "USB High Speed Option driver" 79 #define MOD_LICENSE "GPL" 80 81 #define HSO_MAX_NET_DEVICES 10 82 #define HSO__MAX_MTU 2048 83 #define DEFAULT_MTU 1500 84 #define DEFAULT_MRU 1500 85 86 #define CTRL_URB_RX_SIZE 1024 87 #define CTRL_URB_TX_SIZE 64 88 89 #define BULK_URB_RX_SIZE 4096 90 #define BULK_URB_TX_SIZE 8192 91 92 #define MUX_BULK_RX_BUF_SIZE HSO__MAX_MTU 93 #define MUX_BULK_TX_BUF_SIZE HSO__MAX_MTU 94 #define MUX_BULK_RX_BUF_COUNT 4 95 #define USB_TYPE_OPTION_VENDOR 0x20 96 97 /* These definitions are used with the struct hso_net flags element */ 98 /* - use *_bit operations on it. (bit indices not values.) */ 99 #define HSO_NET_RUNNING 0 100 101 #define HSO_NET_TX_TIMEOUT (HZ*10) 102 103 #define HSO_SERIAL_MAGIC 0x48534f31 104 105 /* Number of ttys to handle */ 106 #define HSO_SERIAL_TTY_MINORS 256 107 108 #define MAX_RX_URBS 2 109 110 /*****************************************************************************/ 111 /* Debugging functions */ 112 /*****************************************************************************/ 113 #define hso_dbg(lvl, fmt, ...) \ 114 do { \ 115 if ((lvl) & debug) \ 116 pr_info("[%d:%s] " fmt, \ 117 __LINE__, __func__, ##__VA_ARGS__); \ 118 } while (0) 119 120 /*****************************************************************************/ 121 /* Enumerators */ 122 /*****************************************************************************/ 123 enum pkt_parse_state { 124 WAIT_IP, 125 WAIT_DATA, 126 WAIT_SYNC 127 }; 128 129 /*****************************************************************************/ 130 /* Structs */ 131 /*****************************************************************************/ 132 133 struct hso_shared_int { 134 struct usb_endpoint_descriptor *intr_endp; 135 void *shared_intr_buf; 136 struct urb *shared_intr_urb; 137 struct usb_device *usb; 138 int use_count; 139 int ref_count; 140 struct mutex shared_int_lock; 141 }; 142 143 struct hso_net { 144 struct hso_device *parent; 145 struct net_device *net; 146 struct rfkill *rfkill; 147 char name[24]; 148 149 struct usb_endpoint_descriptor *in_endp; 150 struct usb_endpoint_descriptor *out_endp; 151 152 struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT]; 153 struct urb *mux_bulk_tx_urb; 154 void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT]; 155 void *mux_bulk_tx_buf; 156 157 struct sk_buff *skb_rx_buf; 158 struct sk_buff *skb_tx_buf; 159 160 enum pkt_parse_state rx_parse_state; 161 spinlock_t net_lock; 162 163 unsigned short rx_buf_size; 164 unsigned short rx_buf_missing; 165 struct iphdr rx_ip_hdr; 166 167 unsigned long flags; 168 }; 169 170 enum rx_ctrl_state{ 171 RX_IDLE, 172 RX_SENT, 173 RX_PENDING 174 }; 175 176 #define BM_REQUEST_TYPE (0xa1) 177 #define B_NOTIFICATION (0x20) 178 #define W_VALUE (0x0) 179 #define W_LENGTH (0x2) 180 181 #define B_OVERRUN (0x1<<6) 182 #define B_PARITY (0x1<<5) 183 #define B_FRAMING (0x1<<4) 184 #define B_RING_SIGNAL (0x1<<3) 185 #define B_BREAK (0x1<<2) 186 #define B_TX_CARRIER (0x1<<1) 187 #define B_RX_CARRIER (0x1<<0) 188 189 struct hso_serial_state_notification { 190 u8 bmRequestType; 191 u8 bNotification; 192 u16 wValue; 193 u16 wIndex; 194 u16 wLength; 195 u16 UART_state_bitmap; 196 } __packed; 197 198 struct hso_tiocmget { 199 struct mutex mutex; 200 wait_queue_head_t waitq; 201 int intr_completed; 202 struct usb_endpoint_descriptor *endp; 203 struct urb *urb; 204 struct hso_serial_state_notification serial_state_notification; 205 u16 prev_UART_state_bitmap; 206 struct uart_icount icount; 207 }; 208 209 210 struct hso_serial { 211 struct hso_device *parent; 212 int magic; 213 u8 minor; 214 215 struct hso_shared_int *shared_int; 216 217 /* rx/tx urb could be either a bulk urb or a control urb depending 218 on which serial port it is used on. */ 219 struct urb *rx_urb[MAX_RX_URBS]; 220 u8 num_rx_urbs; 221 u8 *rx_data[MAX_RX_URBS]; 222 u16 rx_data_length; /* should contain allocated length */ 223 224 struct urb *tx_urb; 225 u8 *tx_data; 226 u8 *tx_buffer; 227 u16 tx_data_length; /* should contain allocated length */ 228 u16 tx_data_count; 229 u16 tx_buffer_count; 230 struct usb_ctrlrequest ctrl_req_tx; 231 struct usb_ctrlrequest ctrl_req_rx; 232 233 struct usb_endpoint_descriptor *in_endp; 234 struct usb_endpoint_descriptor *out_endp; 235 236 enum rx_ctrl_state rx_state; 237 u8 rts_state; 238 u8 dtr_state; 239 unsigned tx_urb_used:1; 240 241 struct tty_port port; 242 /* from usb_serial_port */ 243 spinlock_t serial_lock; 244 245 int (*write_data) (struct hso_serial *serial); 246 struct hso_tiocmget *tiocmget; 247 /* Hacks required to get flow control 248 * working on the serial receive buffers 249 * so as not to drop characters on the floor. 250 */ 251 int curr_rx_urb_idx; 252 u8 rx_urb_filled[MAX_RX_URBS]; 253 struct tasklet_struct unthrottle_tasklet; 254 }; 255 256 struct hso_device { 257 union { 258 struct hso_serial *dev_serial; 259 struct hso_net *dev_net; 260 } port_data; 261 262 u32 port_spec; 263 264 u8 is_active; 265 u8 usb_gone; 266 struct work_struct async_get_intf; 267 struct work_struct async_put_intf; 268 269 struct usb_device *usb; 270 struct usb_interface *interface; 271 272 struct device *dev; 273 struct kref ref; 274 struct mutex mutex; 275 }; 276 277 /* Type of interface */ 278 #define HSO_INTF_MASK 0xFF00 279 #define HSO_INTF_MUX 0x0100 280 #define HSO_INTF_BULK 0x0200 281 282 /* Type of port */ 283 #define HSO_PORT_MASK 0xFF 284 #define HSO_PORT_NO_PORT 0x0 285 #define HSO_PORT_CONTROL 0x1 286 #define HSO_PORT_APP 0x2 287 #define HSO_PORT_GPS 0x3 288 #define HSO_PORT_PCSC 0x4 289 #define HSO_PORT_APP2 0x5 290 #define HSO_PORT_GPS_CONTROL 0x6 291 #define HSO_PORT_MSD 0x7 292 #define HSO_PORT_VOICE 0x8 293 #define HSO_PORT_DIAG2 0x9 294 #define HSO_PORT_DIAG 0x10 295 #define HSO_PORT_MODEM 0x11 296 #define HSO_PORT_NETWORK 0x12 297 298 /* Additional device info */ 299 #define HSO_INFO_MASK 0xFF000000 300 #define HSO_INFO_CRC_BUG 0x01000000 301 302 /*****************************************************************************/ 303 /* Prototypes */ 304 /*****************************************************************************/ 305 /* Serial driver functions */ 306 static int hso_serial_tiocmset(struct tty_struct *tty, 307 unsigned int set, unsigned int clear); 308 static void ctrl_callback(struct urb *urb); 309 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial); 310 static void hso_kick_transmit(struct hso_serial *serial); 311 /* Helper functions */ 312 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int, 313 struct usb_device *usb, gfp_t gfp); 314 static void handle_usb_error(int status, const char *function, 315 struct hso_device *hso_dev); 316 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 317 int type, int dir); 318 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports); 319 static void hso_free_interface(struct usb_interface *intf); 320 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags); 321 static int hso_stop_serial_device(struct hso_device *hso_dev); 322 static int hso_start_net_device(struct hso_device *hso_dev); 323 static void hso_free_shared_int(struct hso_shared_int *shared_int); 324 static int hso_stop_net_device(struct hso_device *hso_dev); 325 static void hso_serial_ref_free(struct kref *ref); 326 static void hso_std_serial_read_bulk_callback(struct urb *urb); 327 static int hso_mux_serial_read(struct hso_serial *serial); 328 static void async_get_intf(struct work_struct *data); 329 static void async_put_intf(struct work_struct *data); 330 static int hso_put_activity(struct hso_device *hso_dev); 331 static int hso_get_activity(struct hso_device *hso_dev); 332 static void tiocmget_intr_callback(struct urb *urb); 333 /*****************************************************************************/ 334 /* Helping functions */ 335 /*****************************************************************************/ 336 337 /* #define DEBUG */ 338 339 static inline struct hso_net *dev2net(struct hso_device *hso_dev) 340 { 341 return hso_dev->port_data.dev_net; 342 } 343 344 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev) 345 { 346 return hso_dev->port_data.dev_serial; 347 } 348 349 /* Debugging functions */ 350 #ifdef DEBUG 351 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf, 352 unsigned int len) 353 { 354 static char name[255]; 355 356 sprintf(name, "hso[%d:%s]", line_count, func_name); 357 print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len); 358 } 359 360 #define DUMP(buf_, len_) \ 361 dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_) 362 363 #define DUMP1(buf_, len_) \ 364 do { \ 365 if (0x01 & debug) \ 366 DUMP(buf_, len_); \ 367 } while (0) 368 #else 369 #define DUMP(buf_, len_) 370 #define DUMP1(buf_, len_) 371 #endif 372 373 /* module parameters */ 374 static int debug; 375 static int tty_major; 376 static int disable_net; 377 378 /* driver info */ 379 static const char driver_name[] = "hso"; 380 static const char tty_filename[] = "ttyHS"; 381 static const char *version = __FILE__ ": " MOD_AUTHOR; 382 /* the usb driver itself (registered in hso_init) */ 383 static struct usb_driver hso_driver; 384 /* serial structures */ 385 static struct tty_driver *tty_drv; 386 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS]; 387 static struct hso_device *network_table[HSO_MAX_NET_DEVICES]; 388 static spinlock_t serial_table_lock; 389 390 static const s32 default_port_spec[] = { 391 HSO_INTF_MUX | HSO_PORT_NETWORK, 392 HSO_INTF_BULK | HSO_PORT_DIAG, 393 HSO_INTF_BULK | HSO_PORT_MODEM, 394 0 395 }; 396 397 static const s32 icon321_port_spec[] = { 398 HSO_INTF_MUX | HSO_PORT_NETWORK, 399 HSO_INTF_BULK | HSO_PORT_DIAG2, 400 HSO_INTF_BULK | HSO_PORT_MODEM, 401 HSO_INTF_BULK | HSO_PORT_DIAG, 402 0 403 }; 404 405 #define default_port_device(vendor, product) \ 406 USB_DEVICE(vendor, product), \ 407 .driver_info = (kernel_ulong_t)default_port_spec 408 409 #define icon321_port_device(vendor, product) \ 410 USB_DEVICE(vendor, product), \ 411 .driver_info = (kernel_ulong_t)icon321_port_spec 412 413 /* list of devices we support */ 414 static const struct usb_device_id hso_ids[] = { 415 {default_port_device(0x0af0, 0x6711)}, 416 {default_port_device(0x0af0, 0x6731)}, 417 {default_port_device(0x0af0, 0x6751)}, 418 {default_port_device(0x0af0, 0x6771)}, 419 {default_port_device(0x0af0, 0x6791)}, 420 {default_port_device(0x0af0, 0x6811)}, 421 {default_port_device(0x0af0, 0x6911)}, 422 {default_port_device(0x0af0, 0x6951)}, 423 {default_port_device(0x0af0, 0x6971)}, 424 {default_port_device(0x0af0, 0x7011)}, 425 {default_port_device(0x0af0, 0x7031)}, 426 {default_port_device(0x0af0, 0x7051)}, 427 {default_port_device(0x0af0, 0x7071)}, 428 {default_port_device(0x0af0, 0x7111)}, 429 {default_port_device(0x0af0, 0x7211)}, 430 {default_port_device(0x0af0, 0x7251)}, 431 {default_port_device(0x0af0, 0x7271)}, 432 {default_port_device(0x0af0, 0x7311)}, 433 {default_port_device(0x0af0, 0xc031)}, /* Icon-Edge */ 434 {icon321_port_device(0x0af0, 0xd013)}, /* Module HSxPA */ 435 {icon321_port_device(0x0af0, 0xd031)}, /* Icon-321 */ 436 {icon321_port_device(0x0af0, 0xd033)}, /* Icon-322 */ 437 {USB_DEVICE(0x0af0, 0x7301)}, /* GE40x */ 438 {USB_DEVICE(0x0af0, 0x7361)}, /* GE40x */ 439 {USB_DEVICE(0x0af0, 0x7381)}, /* GE40x */ 440 {USB_DEVICE(0x0af0, 0x7401)}, /* GI 0401 */ 441 {USB_DEVICE(0x0af0, 0x7501)}, /* GTM 382 */ 442 {USB_DEVICE(0x0af0, 0x7601)}, /* GE40x */ 443 {USB_DEVICE(0x0af0, 0x7701)}, 444 {USB_DEVICE(0x0af0, 0x7706)}, 445 {USB_DEVICE(0x0af0, 0x7801)}, 446 {USB_DEVICE(0x0af0, 0x7901)}, 447 {USB_DEVICE(0x0af0, 0x7A01)}, 448 {USB_DEVICE(0x0af0, 0x7A05)}, 449 {USB_DEVICE(0x0af0, 0x8200)}, 450 {USB_DEVICE(0x0af0, 0x8201)}, 451 {USB_DEVICE(0x0af0, 0x8300)}, 452 {USB_DEVICE(0x0af0, 0x8302)}, 453 {USB_DEVICE(0x0af0, 0x8304)}, 454 {USB_DEVICE(0x0af0, 0x8400)}, 455 {USB_DEVICE(0x0af0, 0x8600)}, 456 {USB_DEVICE(0x0af0, 0x8800)}, 457 {USB_DEVICE(0x0af0, 0x8900)}, 458 {USB_DEVICE(0x0af0, 0x9000)}, 459 {USB_DEVICE(0x0af0, 0x9200)}, /* Option GTM671WFS */ 460 {USB_DEVICE(0x0af0, 0xd035)}, 461 {USB_DEVICE(0x0af0, 0xd055)}, 462 {USB_DEVICE(0x0af0, 0xd155)}, 463 {USB_DEVICE(0x0af0, 0xd255)}, 464 {USB_DEVICE(0x0af0, 0xd057)}, 465 {USB_DEVICE(0x0af0, 0xd157)}, 466 {USB_DEVICE(0x0af0, 0xd257)}, 467 {USB_DEVICE(0x0af0, 0xd357)}, 468 {USB_DEVICE(0x0af0, 0xd058)}, 469 {USB_DEVICE(0x0af0, 0xc100)}, 470 {} 471 }; 472 MODULE_DEVICE_TABLE(usb, hso_ids); 473 474 /* Sysfs attribute */ 475 static ssize_t hso_sysfs_show_porttype(struct device *dev, 476 struct device_attribute *attr, 477 char *buf) 478 { 479 struct hso_device *hso_dev = dev_get_drvdata(dev); 480 char *port_name; 481 482 if (!hso_dev) 483 return 0; 484 485 switch (hso_dev->port_spec & HSO_PORT_MASK) { 486 case HSO_PORT_CONTROL: 487 port_name = "Control"; 488 break; 489 case HSO_PORT_APP: 490 port_name = "Application"; 491 break; 492 case HSO_PORT_APP2: 493 port_name = "Application2"; 494 break; 495 case HSO_PORT_GPS: 496 port_name = "GPS"; 497 break; 498 case HSO_PORT_GPS_CONTROL: 499 port_name = "GPS Control"; 500 break; 501 case HSO_PORT_PCSC: 502 port_name = "PCSC"; 503 break; 504 case HSO_PORT_DIAG: 505 port_name = "Diagnostic"; 506 break; 507 case HSO_PORT_DIAG2: 508 port_name = "Diagnostic2"; 509 break; 510 case HSO_PORT_MODEM: 511 port_name = "Modem"; 512 break; 513 case HSO_PORT_NETWORK: 514 port_name = "Network"; 515 break; 516 default: 517 port_name = "Unknown"; 518 break; 519 } 520 521 return sprintf(buf, "%s\n", port_name); 522 } 523 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL); 524 525 static struct attribute *hso_serial_dev_attrs[] = { 526 &dev_attr_hsotype.attr, 527 NULL 528 }; 529 530 ATTRIBUTE_GROUPS(hso_serial_dev); 531 532 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb) 533 { 534 int idx; 535 536 for (idx = 0; idx < serial->num_rx_urbs; idx++) 537 if (serial->rx_urb[idx] == urb) 538 return idx; 539 dev_err(serial->parent->dev, "hso_urb_to_index failed\n"); 540 return -1; 541 } 542 543 /* converts mux value to a port spec value */ 544 static u32 hso_mux_to_port(int mux) 545 { 546 u32 result; 547 548 switch (mux) { 549 case 0x1: 550 result = HSO_PORT_CONTROL; 551 break; 552 case 0x2: 553 result = HSO_PORT_APP; 554 break; 555 case 0x4: 556 result = HSO_PORT_PCSC; 557 break; 558 case 0x8: 559 result = HSO_PORT_GPS; 560 break; 561 case 0x10: 562 result = HSO_PORT_APP2; 563 break; 564 default: 565 result = HSO_PORT_NO_PORT; 566 } 567 return result; 568 } 569 570 /* converts port spec value to a mux value */ 571 static u32 hso_port_to_mux(int port) 572 { 573 u32 result; 574 575 switch (port & HSO_PORT_MASK) { 576 case HSO_PORT_CONTROL: 577 result = 0x0; 578 break; 579 case HSO_PORT_APP: 580 result = 0x1; 581 break; 582 case HSO_PORT_PCSC: 583 result = 0x2; 584 break; 585 case HSO_PORT_GPS: 586 result = 0x3; 587 break; 588 case HSO_PORT_APP2: 589 result = 0x4; 590 break; 591 default: 592 result = 0x0; 593 } 594 return result; 595 } 596 597 static struct hso_serial *get_serial_by_shared_int_and_type( 598 struct hso_shared_int *shared_int, 599 int mux) 600 { 601 int i, port; 602 603 port = hso_mux_to_port(mux); 604 605 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 606 if (serial_table[i] && 607 (dev2ser(serial_table[i])->shared_int == shared_int) && 608 ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) { 609 return dev2ser(serial_table[i]); 610 } 611 } 612 613 return NULL; 614 } 615 616 static struct hso_serial *get_serial_by_index(unsigned index) 617 { 618 struct hso_serial *serial = NULL; 619 unsigned long flags; 620 621 spin_lock_irqsave(&serial_table_lock, flags); 622 if (serial_table[index]) 623 serial = dev2ser(serial_table[index]); 624 spin_unlock_irqrestore(&serial_table_lock, flags); 625 626 return serial; 627 } 628 629 static int get_free_serial_index(void) 630 { 631 int index; 632 unsigned long flags; 633 634 spin_lock_irqsave(&serial_table_lock, flags); 635 for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) { 636 if (serial_table[index] == NULL) { 637 spin_unlock_irqrestore(&serial_table_lock, flags); 638 return index; 639 } 640 } 641 spin_unlock_irqrestore(&serial_table_lock, flags); 642 643 pr_err("%s: no free serial devices in table\n", __func__); 644 return -1; 645 } 646 647 static void set_serial_by_index(unsigned index, struct hso_serial *serial) 648 { 649 unsigned long flags; 650 651 spin_lock_irqsave(&serial_table_lock, flags); 652 if (serial) 653 serial_table[index] = serial->parent; 654 else 655 serial_table[index] = NULL; 656 spin_unlock_irqrestore(&serial_table_lock, flags); 657 } 658 659 static void handle_usb_error(int status, const char *function, 660 struct hso_device *hso_dev) 661 { 662 char *explanation; 663 664 switch (status) { 665 case -ENODEV: 666 explanation = "no device"; 667 break; 668 case -ENOENT: 669 explanation = "endpoint not enabled"; 670 break; 671 case -EPIPE: 672 explanation = "endpoint stalled"; 673 break; 674 case -ENOSPC: 675 explanation = "not enough bandwidth"; 676 break; 677 case -ESHUTDOWN: 678 explanation = "device disabled"; 679 break; 680 case -EHOSTUNREACH: 681 explanation = "device suspended"; 682 break; 683 case -EINVAL: 684 case -EAGAIN: 685 case -EFBIG: 686 case -EMSGSIZE: 687 explanation = "internal error"; 688 break; 689 case -EILSEQ: 690 case -EPROTO: 691 case -ETIME: 692 case -ETIMEDOUT: 693 explanation = "protocol error"; 694 if (hso_dev) 695 usb_queue_reset_device(hso_dev->interface); 696 break; 697 default: 698 explanation = "unknown status"; 699 break; 700 } 701 702 /* log a meaningful explanation of an USB status */ 703 hso_dbg(0x1, "%s: received USB status - %s (%d)\n", 704 function, explanation, status); 705 } 706 707 /* Network interface functions */ 708 709 /* called when net interface is brought up by ifconfig */ 710 static int hso_net_open(struct net_device *net) 711 { 712 struct hso_net *odev = netdev_priv(net); 713 unsigned long flags = 0; 714 715 if (!odev) { 716 dev_err(&net->dev, "No net device !\n"); 717 return -ENODEV; 718 } 719 720 odev->skb_tx_buf = NULL; 721 722 /* setup environment */ 723 spin_lock_irqsave(&odev->net_lock, flags); 724 odev->rx_parse_state = WAIT_IP; 725 odev->rx_buf_size = 0; 726 odev->rx_buf_missing = sizeof(struct iphdr); 727 spin_unlock_irqrestore(&odev->net_lock, flags); 728 729 /* We are up and running. */ 730 set_bit(HSO_NET_RUNNING, &odev->flags); 731 hso_start_net_device(odev->parent); 732 733 /* Tell the kernel we are ready to start receiving from it */ 734 netif_start_queue(net); 735 736 return 0; 737 } 738 739 /* called when interface is brought down by ifconfig */ 740 static int hso_net_close(struct net_device *net) 741 { 742 struct hso_net *odev = netdev_priv(net); 743 744 /* we don't need the queue anymore */ 745 netif_stop_queue(net); 746 /* no longer running */ 747 clear_bit(HSO_NET_RUNNING, &odev->flags); 748 749 hso_stop_net_device(odev->parent); 750 751 /* done */ 752 return 0; 753 } 754 755 /* USB tells is xmit done, we should start the netqueue again */ 756 static void write_bulk_callback(struct urb *urb) 757 { 758 struct hso_net *odev = urb->context; 759 int status = urb->status; 760 761 /* Sanity check */ 762 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 763 dev_err(&urb->dev->dev, "%s: device not running\n", __func__); 764 return; 765 } 766 767 /* Do we still have a valid kernel network device? */ 768 if (!netif_device_present(odev->net)) { 769 dev_err(&urb->dev->dev, "%s: net device not present\n", 770 __func__); 771 return; 772 } 773 774 /* log status, but don't act on it, we don't need to resubmit anything 775 * anyhow */ 776 if (status) 777 handle_usb_error(status, __func__, odev->parent); 778 779 hso_put_activity(odev->parent); 780 781 /* Tell the network interface we are ready for another frame */ 782 netif_wake_queue(odev->net); 783 } 784 785 /* called by kernel when we need to transmit a packet */ 786 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb, 787 struct net_device *net) 788 { 789 struct hso_net *odev = netdev_priv(net); 790 int result; 791 792 /* Tell the kernel, "No more frames 'til we are done with this one." */ 793 netif_stop_queue(net); 794 if (hso_get_activity(odev->parent) == -EAGAIN) { 795 odev->skb_tx_buf = skb; 796 return NETDEV_TX_OK; 797 } 798 799 /* log if asked */ 800 DUMP1(skb->data, skb->len); 801 /* Copy it from kernel memory to OUR memory */ 802 memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len); 803 hso_dbg(0x1, "len: %d/%d\n", skb->len, MUX_BULK_TX_BUF_SIZE); 804 805 /* Fill in the URB for shipping it out. */ 806 usb_fill_bulk_urb(odev->mux_bulk_tx_urb, 807 odev->parent->usb, 808 usb_sndbulkpipe(odev->parent->usb, 809 odev->out_endp-> 810 bEndpointAddress & 0x7F), 811 odev->mux_bulk_tx_buf, skb->len, write_bulk_callback, 812 odev); 813 814 /* Deal with the Zero Length packet problem, I hope */ 815 odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET; 816 817 /* Send the URB on its merry way. */ 818 result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC); 819 if (result) { 820 dev_warn(&odev->parent->interface->dev, 821 "failed mux_bulk_tx_urb %d\n", result); 822 net->stats.tx_errors++; 823 netif_start_queue(net); 824 } else { 825 net->stats.tx_packets++; 826 net->stats.tx_bytes += skb->len; 827 } 828 dev_kfree_skb(skb); 829 /* we're done */ 830 return NETDEV_TX_OK; 831 } 832 833 static const struct ethtool_ops ops = { 834 .get_link = ethtool_op_get_link 835 }; 836 837 /* called when a packet did not ack after watchdogtimeout */ 838 static void hso_net_tx_timeout(struct net_device *net) 839 { 840 struct hso_net *odev = netdev_priv(net); 841 842 if (!odev) 843 return; 844 845 /* Tell syslog we are hosed. */ 846 dev_warn(&net->dev, "Tx timed out.\n"); 847 848 /* Tear the waiting frame off the list */ 849 if (odev->mux_bulk_tx_urb && 850 (odev->mux_bulk_tx_urb->status == -EINPROGRESS)) 851 usb_unlink_urb(odev->mux_bulk_tx_urb); 852 853 /* Update statistics */ 854 net->stats.tx_errors++; 855 } 856 857 /* make a real packet from the received USB buffer */ 858 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt, 859 unsigned int count, unsigned char is_eop) 860 { 861 unsigned short temp_bytes; 862 unsigned short buffer_offset = 0; 863 unsigned short frame_len; 864 865 /* log if needed */ 866 hso_dbg(0x1, "Rx %d bytes\n", count); 867 DUMP(ip_pkt, min(128, (int)count)); 868 869 while (count) { 870 switch (odev->rx_parse_state) { 871 case WAIT_IP: 872 /* waiting for IP header. */ 873 /* wanted bytes - size of ip header */ 874 temp_bytes = 875 (count < 876 odev->rx_buf_missing) ? count : odev-> 877 rx_buf_missing; 878 879 memcpy(((unsigned char *)(&odev->rx_ip_hdr)) + 880 odev->rx_buf_size, ip_pkt + buffer_offset, 881 temp_bytes); 882 883 odev->rx_buf_size += temp_bytes; 884 buffer_offset += temp_bytes; 885 odev->rx_buf_missing -= temp_bytes; 886 count -= temp_bytes; 887 888 if (!odev->rx_buf_missing) { 889 /* header is complete allocate an sk_buffer and 890 * continue to WAIT_DATA */ 891 frame_len = ntohs(odev->rx_ip_hdr.tot_len); 892 893 if ((frame_len > DEFAULT_MRU) || 894 (frame_len < sizeof(struct iphdr))) { 895 dev_err(&odev->net->dev, 896 "Invalid frame (%d) length\n", 897 frame_len); 898 odev->rx_parse_state = WAIT_SYNC; 899 continue; 900 } 901 /* Allocate an sk_buff */ 902 odev->skb_rx_buf = netdev_alloc_skb(odev->net, 903 frame_len); 904 if (!odev->skb_rx_buf) { 905 /* We got no receive buffer. */ 906 hso_dbg(0x1, "could not allocate memory\n"); 907 odev->rx_parse_state = WAIT_SYNC; 908 continue; 909 } 910 911 /* Copy what we got so far. make room for iphdr 912 * after tail. */ 913 skb_put_data(odev->skb_rx_buf, 914 (char *)&(odev->rx_ip_hdr), 915 sizeof(struct iphdr)); 916 917 /* ETH_HLEN */ 918 odev->rx_buf_size = sizeof(struct iphdr); 919 920 /* Filip actually use .tot_len */ 921 odev->rx_buf_missing = 922 frame_len - sizeof(struct iphdr); 923 odev->rx_parse_state = WAIT_DATA; 924 } 925 break; 926 927 case WAIT_DATA: 928 temp_bytes = (count < odev->rx_buf_missing) 929 ? count : odev->rx_buf_missing; 930 931 /* Copy the rest of the bytes that are left in the 932 * buffer into the waiting sk_buf. */ 933 /* Make room for temp_bytes after tail. */ 934 skb_put_data(odev->skb_rx_buf, 935 ip_pkt + buffer_offset, 936 temp_bytes); 937 938 odev->rx_buf_missing -= temp_bytes; 939 count -= temp_bytes; 940 buffer_offset += temp_bytes; 941 odev->rx_buf_size += temp_bytes; 942 if (!odev->rx_buf_missing) { 943 /* Packet is complete. Inject into stack. */ 944 /* We have IP packet here */ 945 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP); 946 skb_reset_mac_header(odev->skb_rx_buf); 947 948 /* Ship it off to the kernel */ 949 netif_rx(odev->skb_rx_buf); 950 /* No longer our buffer. */ 951 odev->skb_rx_buf = NULL; 952 953 /* update out statistics */ 954 odev->net->stats.rx_packets++; 955 956 odev->net->stats.rx_bytes += odev->rx_buf_size; 957 958 odev->rx_buf_size = 0; 959 odev->rx_buf_missing = sizeof(struct iphdr); 960 odev->rx_parse_state = WAIT_IP; 961 } 962 break; 963 964 case WAIT_SYNC: 965 hso_dbg(0x1, " W_S\n"); 966 count = 0; 967 break; 968 default: 969 hso_dbg(0x1, "\n"); 970 count--; 971 break; 972 } 973 } 974 975 /* Recovery mechanism for WAIT_SYNC state. */ 976 if (is_eop) { 977 if (odev->rx_parse_state == WAIT_SYNC) { 978 odev->rx_parse_state = WAIT_IP; 979 odev->rx_buf_size = 0; 980 odev->rx_buf_missing = sizeof(struct iphdr); 981 } 982 } 983 } 984 985 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size) 986 { 987 static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF }; 988 u32 rest = urb->actual_length % le16_to_cpu(max_packet_size); 989 990 if (((rest == 5) || (rest == 6)) && 991 !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4, 992 crc_check, 4)) { 993 urb->actual_length -= 4; 994 } 995 } 996 997 /* Moving data from usb to kernel (in interrupt state) */ 998 static void read_bulk_callback(struct urb *urb) 999 { 1000 struct hso_net *odev = urb->context; 1001 struct net_device *net; 1002 int result; 1003 int status = urb->status; 1004 1005 /* is al ok? (Filip: Who's Al ?) */ 1006 if (status) { 1007 handle_usb_error(status, __func__, odev->parent); 1008 return; 1009 } 1010 1011 /* Sanity check */ 1012 if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) { 1013 hso_dbg(0x1, "BULK IN callback but driver is not active!\n"); 1014 return; 1015 } 1016 usb_mark_last_busy(urb->dev); 1017 1018 net = odev->net; 1019 1020 if (!netif_device_present(net)) { 1021 /* Somebody killed our network interface... */ 1022 return; 1023 } 1024 1025 if (odev->parent->port_spec & HSO_INFO_CRC_BUG) 1026 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize); 1027 1028 /* do we even have a packet? */ 1029 if (urb->actual_length) { 1030 /* Handle the IP stream, add header and push it onto network 1031 * stack if the packet is complete. */ 1032 spin_lock(&odev->net_lock); 1033 packetizeRx(odev, urb->transfer_buffer, urb->actual_length, 1034 (urb->transfer_buffer_length > 1035 urb->actual_length) ? 1 : 0); 1036 spin_unlock(&odev->net_lock); 1037 } 1038 1039 /* We are done with this URB, resubmit it. Prep the USB to wait for 1040 * another frame. Reuse same as received. */ 1041 usb_fill_bulk_urb(urb, 1042 odev->parent->usb, 1043 usb_rcvbulkpipe(odev->parent->usb, 1044 odev->in_endp-> 1045 bEndpointAddress & 0x7F), 1046 urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE, 1047 read_bulk_callback, odev); 1048 1049 /* Give this to the USB subsystem so it can tell us when more data 1050 * arrives. */ 1051 result = usb_submit_urb(urb, GFP_ATOMIC); 1052 if (result) 1053 dev_warn(&odev->parent->interface->dev, 1054 "%s failed submit mux_bulk_rx_urb %d\n", __func__, 1055 result); 1056 } 1057 1058 /* Serial driver functions */ 1059 1060 static void hso_init_termios(struct ktermios *termios) 1061 { 1062 /* 1063 * The default requirements for this device are: 1064 */ 1065 termios->c_iflag &= 1066 ~(IGNBRK /* disable ignore break */ 1067 | BRKINT /* disable break causes interrupt */ 1068 | PARMRK /* disable mark parity errors */ 1069 | ISTRIP /* disable clear high bit of input characters */ 1070 | INLCR /* disable translate NL to CR */ 1071 | IGNCR /* disable ignore CR */ 1072 | ICRNL /* disable translate CR to NL */ 1073 | IXON); /* disable enable XON/XOFF flow control */ 1074 1075 /* disable postprocess output characters */ 1076 termios->c_oflag &= ~OPOST; 1077 1078 termios->c_lflag &= 1079 ~(ECHO /* disable echo input characters */ 1080 | ECHONL /* disable echo new line */ 1081 | ICANON /* disable erase, kill, werase, and rprnt 1082 special characters */ 1083 | ISIG /* disable interrupt, quit, and suspend special 1084 characters */ 1085 | IEXTEN); /* disable non-POSIX special characters */ 1086 1087 termios->c_cflag &= 1088 ~(CSIZE /* no size */ 1089 | PARENB /* disable parity bit */ 1090 | CBAUD /* clear current baud rate */ 1091 | CBAUDEX); /* clear current buad rate */ 1092 1093 termios->c_cflag |= CS8; /* character size 8 bits */ 1094 1095 /* baud rate 115200 */ 1096 tty_termios_encode_baud_rate(termios, 115200, 115200); 1097 } 1098 1099 static void _hso_serial_set_termios(struct tty_struct *tty, 1100 struct ktermios *old) 1101 { 1102 struct hso_serial *serial = tty->driver_data; 1103 1104 if (!serial) { 1105 pr_err("%s: no tty structures", __func__); 1106 return; 1107 } 1108 1109 hso_dbg(0x8, "port %d\n", serial->minor); 1110 1111 /* 1112 * Fix up unsupported bits 1113 */ 1114 tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ 1115 1116 tty->termios.c_cflag &= 1117 ~(CSIZE /* no size */ 1118 | PARENB /* disable parity bit */ 1119 | CBAUD /* clear current baud rate */ 1120 | CBAUDEX); /* clear current buad rate */ 1121 1122 tty->termios.c_cflag |= CS8; /* character size 8 bits */ 1123 1124 /* baud rate 115200 */ 1125 tty_encode_baud_rate(tty, 115200, 115200); 1126 } 1127 1128 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb) 1129 { 1130 int result; 1131 /* We are done with this URB, resubmit it. Prep the USB to wait for 1132 * another frame */ 1133 usb_fill_bulk_urb(urb, serial->parent->usb, 1134 usb_rcvbulkpipe(serial->parent->usb, 1135 serial->in_endp-> 1136 bEndpointAddress & 0x7F), 1137 urb->transfer_buffer, serial->rx_data_length, 1138 hso_std_serial_read_bulk_callback, serial); 1139 /* Give this to the USB subsystem so it can tell us when more data 1140 * arrives. */ 1141 result = usb_submit_urb(urb, GFP_ATOMIC); 1142 if (result) { 1143 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n", 1144 __func__, result); 1145 } 1146 } 1147 1148 1149 1150 1151 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial) 1152 { 1153 int count; 1154 struct urb *curr_urb; 1155 1156 while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) { 1157 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx]; 1158 count = put_rxbuf_data(curr_urb, serial); 1159 if (count == -1) 1160 return; 1161 if (count == 0) { 1162 serial->curr_rx_urb_idx++; 1163 if (serial->curr_rx_urb_idx >= serial->num_rx_urbs) 1164 serial->curr_rx_urb_idx = 0; 1165 hso_resubmit_rx_bulk_urb(serial, curr_urb); 1166 } 1167 } 1168 } 1169 1170 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial) 1171 { 1172 int count = 0; 1173 struct urb *urb; 1174 1175 urb = serial->rx_urb[0]; 1176 if (serial->port.count > 0) { 1177 count = put_rxbuf_data(urb, serial); 1178 if (count == -1) 1179 return; 1180 } 1181 /* Re issue a read as long as we receive data. */ 1182 1183 if (count == 0 && ((urb->actual_length != 0) || 1184 (serial->rx_state == RX_PENDING))) { 1185 serial->rx_state = RX_SENT; 1186 hso_mux_serial_read(serial); 1187 } else 1188 serial->rx_state = RX_IDLE; 1189 } 1190 1191 1192 /* read callback for Diag and CS port */ 1193 static void hso_std_serial_read_bulk_callback(struct urb *urb) 1194 { 1195 struct hso_serial *serial = urb->context; 1196 int status = urb->status; 1197 1198 hso_dbg(0x8, "--- Got serial_read_bulk callback %02x ---\n", status); 1199 1200 /* sanity check */ 1201 if (!serial) { 1202 hso_dbg(0x1, "serial == NULL\n"); 1203 return; 1204 } 1205 if (status) { 1206 handle_usb_error(status, __func__, serial->parent); 1207 return; 1208 } 1209 1210 hso_dbg(0x1, "Actual length = %d\n", urb->actual_length); 1211 DUMP1(urb->transfer_buffer, urb->actual_length); 1212 1213 /* Anyone listening? */ 1214 if (serial->port.count == 0) 1215 return; 1216 1217 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) 1218 fix_crc_bug(urb, serial->in_endp->wMaxPacketSize); 1219 /* Valid data, handle RX data */ 1220 spin_lock(&serial->serial_lock); 1221 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1; 1222 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1223 spin_unlock(&serial->serial_lock); 1224 } 1225 1226 /* 1227 * This needs to be a tasklet otherwise we will 1228 * end up recursively calling this function. 1229 */ 1230 static void hso_unthrottle_tasklet(struct hso_serial *serial) 1231 { 1232 unsigned long flags; 1233 1234 spin_lock_irqsave(&serial->serial_lock, flags); 1235 if ((serial->parent->port_spec & HSO_INTF_MUX)) 1236 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 1237 else 1238 put_rxbuf_data_and_resubmit_bulk_urb(serial); 1239 spin_unlock_irqrestore(&serial->serial_lock, flags); 1240 } 1241 1242 static void hso_unthrottle(struct tty_struct *tty) 1243 { 1244 struct hso_serial *serial = tty->driver_data; 1245 1246 tasklet_hi_schedule(&serial->unthrottle_tasklet); 1247 } 1248 1249 /* open the requested serial port */ 1250 static int hso_serial_open(struct tty_struct *tty, struct file *filp) 1251 { 1252 struct hso_serial *serial = get_serial_by_index(tty->index); 1253 int result; 1254 1255 /* sanity check */ 1256 if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) { 1257 WARN_ON(1); 1258 tty->driver_data = NULL; 1259 hso_dbg(0x1, "Failed to open port\n"); 1260 return -ENODEV; 1261 } 1262 1263 mutex_lock(&serial->parent->mutex); 1264 result = usb_autopm_get_interface(serial->parent->interface); 1265 if (result < 0) 1266 goto err_out; 1267 1268 hso_dbg(0x1, "Opening %d\n", serial->minor); 1269 1270 /* setup */ 1271 tty->driver_data = serial; 1272 tty_port_tty_set(&serial->port, tty); 1273 1274 /* check for port already opened, if not set the termios */ 1275 serial->port.count++; 1276 if (serial->port.count == 1) { 1277 serial->rx_state = RX_IDLE; 1278 /* Force default termio settings */ 1279 _hso_serial_set_termios(tty, NULL); 1280 tasklet_init(&serial->unthrottle_tasklet, 1281 (void (*)(unsigned long))hso_unthrottle_tasklet, 1282 (unsigned long)serial); 1283 result = hso_start_serial_device(serial->parent, GFP_KERNEL); 1284 if (result) { 1285 hso_stop_serial_device(serial->parent); 1286 serial->port.count--; 1287 } else { 1288 kref_get(&serial->parent->ref); 1289 } 1290 } else { 1291 hso_dbg(0x1, "Port was already open\n"); 1292 } 1293 1294 usb_autopm_put_interface(serial->parent->interface); 1295 1296 /* done */ 1297 if (result) 1298 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0); 1299 err_out: 1300 mutex_unlock(&serial->parent->mutex); 1301 return result; 1302 } 1303 1304 /* close the requested serial port */ 1305 static void hso_serial_close(struct tty_struct *tty, struct file *filp) 1306 { 1307 struct hso_serial *serial = tty->driver_data; 1308 u8 usb_gone; 1309 1310 hso_dbg(0x1, "Closing serial port\n"); 1311 1312 /* Open failed, no close cleanup required */ 1313 if (serial == NULL) 1314 return; 1315 1316 mutex_lock(&serial->parent->mutex); 1317 usb_gone = serial->parent->usb_gone; 1318 1319 if (!usb_gone) 1320 usb_autopm_get_interface(serial->parent->interface); 1321 1322 /* reset the rts and dtr */ 1323 /* do the actual close */ 1324 serial->port.count--; 1325 1326 if (serial->port.count <= 0) { 1327 serial->port.count = 0; 1328 tty_port_tty_set(&serial->port, NULL); 1329 if (!usb_gone) 1330 hso_stop_serial_device(serial->parent); 1331 tasklet_kill(&serial->unthrottle_tasklet); 1332 } 1333 1334 if (!usb_gone) 1335 usb_autopm_put_interface(serial->parent->interface); 1336 1337 mutex_unlock(&serial->parent->mutex); 1338 } 1339 1340 /* close the requested serial port */ 1341 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf, 1342 int count) 1343 { 1344 struct hso_serial *serial = tty->driver_data; 1345 int space, tx_bytes; 1346 unsigned long flags; 1347 1348 /* sanity check */ 1349 if (serial == NULL) { 1350 pr_err("%s: serial is NULL\n", __func__); 1351 return -ENODEV; 1352 } 1353 1354 spin_lock_irqsave(&serial->serial_lock, flags); 1355 1356 space = serial->tx_data_length - serial->tx_buffer_count; 1357 tx_bytes = (count < space) ? count : space; 1358 1359 if (!tx_bytes) 1360 goto out; 1361 1362 memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes); 1363 serial->tx_buffer_count += tx_bytes; 1364 1365 out: 1366 spin_unlock_irqrestore(&serial->serial_lock, flags); 1367 1368 hso_kick_transmit(serial); 1369 /* done */ 1370 return tx_bytes; 1371 } 1372 1373 /* how much room is there for writing */ 1374 static int hso_serial_write_room(struct tty_struct *tty) 1375 { 1376 struct hso_serial *serial = tty->driver_data; 1377 int room; 1378 unsigned long flags; 1379 1380 spin_lock_irqsave(&serial->serial_lock, flags); 1381 room = serial->tx_data_length - serial->tx_buffer_count; 1382 spin_unlock_irqrestore(&serial->serial_lock, flags); 1383 1384 /* return free room */ 1385 return room; 1386 } 1387 1388 static void hso_serial_cleanup(struct tty_struct *tty) 1389 { 1390 struct hso_serial *serial = tty->driver_data; 1391 1392 if (!serial) 1393 return; 1394 1395 kref_put(&serial->parent->ref, hso_serial_ref_free); 1396 } 1397 1398 /* setup the term */ 1399 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) 1400 { 1401 struct hso_serial *serial = tty->driver_data; 1402 unsigned long flags; 1403 1404 if (old) 1405 hso_dbg(0x16, "Termios called with: cflags new[%d] - old[%d]\n", 1406 tty->termios.c_cflag, old->c_cflag); 1407 1408 /* the actual setup */ 1409 spin_lock_irqsave(&serial->serial_lock, flags); 1410 if (serial->port.count) 1411 _hso_serial_set_termios(tty, old); 1412 else 1413 tty->termios = *old; 1414 spin_unlock_irqrestore(&serial->serial_lock, flags); 1415 1416 /* done */ 1417 } 1418 1419 /* how many characters in the buffer */ 1420 static int hso_serial_chars_in_buffer(struct tty_struct *tty) 1421 { 1422 struct hso_serial *serial = tty->driver_data; 1423 int chars; 1424 unsigned long flags; 1425 1426 /* sanity check */ 1427 if (serial == NULL) 1428 return 0; 1429 1430 spin_lock_irqsave(&serial->serial_lock, flags); 1431 chars = serial->tx_buffer_count; 1432 spin_unlock_irqrestore(&serial->serial_lock, flags); 1433 1434 return chars; 1435 } 1436 static int tiocmget_submit_urb(struct hso_serial *serial, 1437 struct hso_tiocmget *tiocmget, 1438 struct usb_device *usb) 1439 { 1440 int result; 1441 1442 if (serial->parent->usb_gone) 1443 return -ENODEV; 1444 usb_fill_int_urb(tiocmget->urb, usb, 1445 usb_rcvintpipe(usb, 1446 tiocmget->endp-> 1447 bEndpointAddress & 0x7F), 1448 &tiocmget->serial_state_notification, 1449 sizeof(struct hso_serial_state_notification), 1450 tiocmget_intr_callback, serial, 1451 tiocmget->endp->bInterval); 1452 result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC); 1453 if (result) { 1454 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__, 1455 result); 1456 } 1457 return result; 1458 1459 } 1460 1461 static void tiocmget_intr_callback(struct urb *urb) 1462 { 1463 struct hso_serial *serial = urb->context; 1464 struct hso_tiocmget *tiocmget; 1465 int status = urb->status; 1466 u16 UART_state_bitmap, prev_UART_state_bitmap; 1467 struct uart_icount *icount; 1468 struct hso_serial_state_notification *serial_state_notification; 1469 struct usb_device *usb; 1470 struct usb_interface *interface; 1471 int if_num; 1472 1473 /* Sanity checks */ 1474 if (!serial) 1475 return; 1476 if (status) { 1477 handle_usb_error(status, __func__, serial->parent); 1478 return; 1479 } 1480 1481 /* tiocmget is only supported on HSO_PORT_MODEM */ 1482 tiocmget = serial->tiocmget; 1483 if (!tiocmget) 1484 return; 1485 BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM); 1486 1487 usb = serial->parent->usb; 1488 interface = serial->parent->interface; 1489 1490 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1491 1492 /* wIndex should be the USB interface number of the port to which the 1493 * notification applies, which should always be the Modem port. 1494 */ 1495 serial_state_notification = &tiocmget->serial_state_notification; 1496 if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE || 1497 serial_state_notification->bNotification != B_NOTIFICATION || 1498 le16_to_cpu(serial_state_notification->wValue) != W_VALUE || 1499 le16_to_cpu(serial_state_notification->wIndex) != if_num || 1500 le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) { 1501 dev_warn(&usb->dev, 1502 "hso received invalid serial state notification\n"); 1503 DUMP(serial_state_notification, 1504 sizeof(struct hso_serial_state_notification)); 1505 } else { 1506 1507 UART_state_bitmap = le16_to_cpu(serial_state_notification-> 1508 UART_state_bitmap); 1509 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap; 1510 icount = &tiocmget->icount; 1511 spin_lock(&serial->serial_lock); 1512 if ((UART_state_bitmap & B_OVERRUN) != 1513 (prev_UART_state_bitmap & B_OVERRUN)) 1514 icount->parity++; 1515 if ((UART_state_bitmap & B_PARITY) != 1516 (prev_UART_state_bitmap & B_PARITY)) 1517 icount->parity++; 1518 if ((UART_state_bitmap & B_FRAMING) != 1519 (prev_UART_state_bitmap & B_FRAMING)) 1520 icount->frame++; 1521 if ((UART_state_bitmap & B_RING_SIGNAL) && 1522 !(prev_UART_state_bitmap & B_RING_SIGNAL)) 1523 icount->rng++; 1524 if ((UART_state_bitmap & B_BREAK) != 1525 (prev_UART_state_bitmap & B_BREAK)) 1526 icount->brk++; 1527 if ((UART_state_bitmap & B_TX_CARRIER) != 1528 (prev_UART_state_bitmap & B_TX_CARRIER)) 1529 icount->dsr++; 1530 if ((UART_state_bitmap & B_RX_CARRIER) != 1531 (prev_UART_state_bitmap & B_RX_CARRIER)) 1532 icount->dcd++; 1533 tiocmget->prev_UART_state_bitmap = UART_state_bitmap; 1534 spin_unlock(&serial->serial_lock); 1535 tiocmget->intr_completed = 1; 1536 wake_up_interruptible(&tiocmget->waitq); 1537 } 1538 memset(serial_state_notification, 0, 1539 sizeof(struct hso_serial_state_notification)); 1540 tiocmget_submit_urb(serial, 1541 tiocmget, 1542 serial->parent->usb); 1543 } 1544 1545 /* 1546 * next few functions largely stolen from drivers/serial/serial_core.c 1547 */ 1548 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change 1549 * - mask passed in arg for lines of interest 1550 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) 1551 * Caller should use TIOCGICOUNT to see which one it was 1552 */ 1553 static int 1554 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg) 1555 { 1556 DECLARE_WAITQUEUE(wait, current); 1557 struct uart_icount cprev, cnow; 1558 struct hso_tiocmget *tiocmget; 1559 int ret; 1560 1561 tiocmget = serial->tiocmget; 1562 if (!tiocmget) 1563 return -ENOENT; 1564 /* 1565 * note the counters on entry 1566 */ 1567 spin_lock_irq(&serial->serial_lock); 1568 memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount)); 1569 spin_unlock_irq(&serial->serial_lock); 1570 add_wait_queue(&tiocmget->waitq, &wait); 1571 for (;;) { 1572 spin_lock_irq(&serial->serial_lock); 1573 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1574 spin_unlock_irq(&serial->serial_lock); 1575 set_current_state(TASK_INTERRUPTIBLE); 1576 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 1577 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 1578 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd))) { 1579 ret = 0; 1580 break; 1581 } 1582 schedule(); 1583 /* see if a signal did it */ 1584 if (signal_pending(current)) { 1585 ret = -ERESTARTSYS; 1586 break; 1587 } 1588 cprev = cnow; 1589 } 1590 __set_current_state(TASK_RUNNING); 1591 remove_wait_queue(&tiocmget->waitq, &wait); 1592 1593 return ret; 1594 } 1595 1596 /* 1597 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) 1598 * Return: write counters to the user passed counter struct 1599 * NB: both 1->0 and 0->1 transitions are counted except for 1600 * RI where only 0->1 is counted. 1601 */ 1602 static int hso_get_count(struct tty_struct *tty, 1603 struct serial_icounter_struct *icount) 1604 { 1605 struct uart_icount cnow; 1606 struct hso_serial *serial = tty->driver_data; 1607 struct hso_tiocmget *tiocmget = serial->tiocmget; 1608 1609 memset(icount, 0, sizeof(struct serial_icounter_struct)); 1610 1611 if (!tiocmget) 1612 return -ENOENT; 1613 spin_lock_irq(&serial->serial_lock); 1614 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount)); 1615 spin_unlock_irq(&serial->serial_lock); 1616 1617 icount->cts = cnow.cts; 1618 icount->dsr = cnow.dsr; 1619 icount->rng = cnow.rng; 1620 icount->dcd = cnow.dcd; 1621 icount->rx = cnow.rx; 1622 icount->tx = cnow.tx; 1623 icount->frame = cnow.frame; 1624 icount->overrun = cnow.overrun; 1625 icount->parity = cnow.parity; 1626 icount->brk = cnow.brk; 1627 icount->buf_overrun = cnow.buf_overrun; 1628 1629 return 0; 1630 } 1631 1632 1633 static int hso_serial_tiocmget(struct tty_struct *tty) 1634 { 1635 int retval; 1636 struct hso_serial *serial = tty->driver_data; 1637 struct hso_tiocmget *tiocmget; 1638 u16 UART_state_bitmap; 1639 1640 /* sanity check */ 1641 if (!serial) { 1642 hso_dbg(0x1, "no tty structures\n"); 1643 return -EINVAL; 1644 } 1645 spin_lock_irq(&serial->serial_lock); 1646 retval = ((serial->rts_state) ? TIOCM_RTS : 0) | 1647 ((serial->dtr_state) ? TIOCM_DTR : 0); 1648 tiocmget = serial->tiocmget; 1649 if (tiocmget) { 1650 1651 UART_state_bitmap = le16_to_cpu( 1652 tiocmget->prev_UART_state_bitmap); 1653 if (UART_state_bitmap & B_RING_SIGNAL) 1654 retval |= TIOCM_RNG; 1655 if (UART_state_bitmap & B_RX_CARRIER) 1656 retval |= TIOCM_CD; 1657 if (UART_state_bitmap & B_TX_CARRIER) 1658 retval |= TIOCM_DSR; 1659 } 1660 spin_unlock_irq(&serial->serial_lock); 1661 return retval; 1662 } 1663 1664 static int hso_serial_tiocmset(struct tty_struct *tty, 1665 unsigned int set, unsigned int clear) 1666 { 1667 int val = 0; 1668 unsigned long flags; 1669 int if_num; 1670 struct hso_serial *serial = tty->driver_data; 1671 struct usb_interface *interface; 1672 1673 /* sanity check */ 1674 if (!serial) { 1675 hso_dbg(0x1, "no tty structures\n"); 1676 return -EINVAL; 1677 } 1678 1679 if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM) 1680 return -EINVAL; 1681 1682 interface = serial->parent->interface; 1683 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 1684 1685 spin_lock_irqsave(&serial->serial_lock, flags); 1686 if (set & TIOCM_RTS) 1687 serial->rts_state = 1; 1688 if (set & TIOCM_DTR) 1689 serial->dtr_state = 1; 1690 1691 if (clear & TIOCM_RTS) 1692 serial->rts_state = 0; 1693 if (clear & TIOCM_DTR) 1694 serial->dtr_state = 0; 1695 1696 if (serial->dtr_state) 1697 val |= 0x01; 1698 if (serial->rts_state) 1699 val |= 0x02; 1700 1701 spin_unlock_irqrestore(&serial->serial_lock, flags); 1702 1703 return usb_control_msg(serial->parent->usb, 1704 usb_rcvctrlpipe(serial->parent->usb, 0), 0x22, 1705 0x21, val, if_num, NULL, 0, 1706 USB_CTRL_SET_TIMEOUT); 1707 } 1708 1709 static int hso_serial_ioctl(struct tty_struct *tty, 1710 unsigned int cmd, unsigned long arg) 1711 { 1712 struct hso_serial *serial = tty->driver_data; 1713 int ret = 0; 1714 hso_dbg(0x8, "IOCTL cmd: %d, arg: %ld\n", cmd, arg); 1715 1716 if (!serial) 1717 return -ENODEV; 1718 switch (cmd) { 1719 case TIOCMIWAIT: 1720 ret = hso_wait_modem_status(serial, arg); 1721 break; 1722 default: 1723 ret = -ENOIOCTLCMD; 1724 break; 1725 } 1726 return ret; 1727 } 1728 1729 1730 /* starts a transmit */ 1731 static void hso_kick_transmit(struct hso_serial *serial) 1732 { 1733 u8 *temp; 1734 unsigned long flags; 1735 int res; 1736 1737 spin_lock_irqsave(&serial->serial_lock, flags); 1738 if (!serial->tx_buffer_count) 1739 goto out; 1740 1741 if (serial->tx_urb_used) 1742 goto out; 1743 1744 /* Wakeup USB interface if necessary */ 1745 if (hso_get_activity(serial->parent) == -EAGAIN) 1746 goto out; 1747 1748 /* Switch pointers around to avoid memcpy */ 1749 temp = serial->tx_buffer; 1750 serial->tx_buffer = serial->tx_data; 1751 serial->tx_data = temp; 1752 serial->tx_data_count = serial->tx_buffer_count; 1753 serial->tx_buffer_count = 0; 1754 1755 /* If temp is set, it means we switched buffers */ 1756 if (temp && serial->write_data) { 1757 res = serial->write_data(serial); 1758 if (res >= 0) 1759 serial->tx_urb_used = 1; 1760 } 1761 out: 1762 spin_unlock_irqrestore(&serial->serial_lock, flags); 1763 } 1764 1765 /* make a request (for reading and writing data to muxed serial port) */ 1766 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port, 1767 struct urb *ctrl_urb, 1768 struct usb_ctrlrequest *ctrl_req, 1769 u8 *ctrl_urb_data, u32 size) 1770 { 1771 int result; 1772 int pipe; 1773 1774 /* Sanity check */ 1775 if (!serial || !ctrl_urb || !ctrl_req) { 1776 pr_err("%s: Wrong arguments\n", __func__); 1777 return -EINVAL; 1778 } 1779 1780 /* initialize */ 1781 ctrl_req->wValue = 0; 1782 ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port)); 1783 ctrl_req->wLength = cpu_to_le16(size); 1784 1785 if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) { 1786 /* Reading command */ 1787 ctrl_req->bRequestType = USB_DIR_IN | 1788 USB_TYPE_OPTION_VENDOR | 1789 USB_RECIP_INTERFACE; 1790 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE; 1791 pipe = usb_rcvctrlpipe(serial->parent->usb, 0); 1792 } else { 1793 /* Writing command */ 1794 ctrl_req->bRequestType = USB_DIR_OUT | 1795 USB_TYPE_OPTION_VENDOR | 1796 USB_RECIP_INTERFACE; 1797 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND; 1798 pipe = usb_sndctrlpipe(serial->parent->usb, 0); 1799 } 1800 /* syslog */ 1801 hso_dbg(0x2, "%s command (%02x) len: %d, port: %d\n", 1802 type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write", 1803 ctrl_req->bRequestType, ctrl_req->wLength, port); 1804 1805 /* Load ctrl urb */ 1806 ctrl_urb->transfer_flags = 0; 1807 usb_fill_control_urb(ctrl_urb, 1808 serial->parent->usb, 1809 pipe, 1810 (u8 *) ctrl_req, 1811 ctrl_urb_data, size, ctrl_callback, serial); 1812 /* Send it on merry way */ 1813 result = usb_submit_urb(ctrl_urb, GFP_ATOMIC); 1814 if (result) { 1815 dev_err(&ctrl_urb->dev->dev, 1816 "%s failed submit ctrl_urb %d type %d\n", __func__, 1817 result, type); 1818 return result; 1819 } 1820 1821 /* done */ 1822 return size; 1823 } 1824 1825 /* called by intr_callback when read occurs */ 1826 static int hso_mux_serial_read(struct hso_serial *serial) 1827 { 1828 if (!serial) 1829 return -EINVAL; 1830 1831 /* clean data */ 1832 memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE); 1833 /* make the request */ 1834 1835 if (serial->num_rx_urbs != 1) { 1836 dev_err(&serial->parent->interface->dev, 1837 "ERROR: mux'd reads with multiple buffers " 1838 "not possible\n"); 1839 return 0; 1840 } 1841 return mux_device_request(serial, 1842 USB_CDC_GET_ENCAPSULATED_RESPONSE, 1843 serial->parent->port_spec & HSO_PORT_MASK, 1844 serial->rx_urb[0], 1845 &serial->ctrl_req_rx, 1846 serial->rx_data[0], serial->rx_data_length); 1847 } 1848 1849 /* used for muxed serial port callback (muxed serial read) */ 1850 static void intr_callback(struct urb *urb) 1851 { 1852 struct hso_shared_int *shared_int = urb->context; 1853 struct hso_serial *serial; 1854 unsigned char *port_req; 1855 int status = urb->status; 1856 int i; 1857 1858 usb_mark_last_busy(urb->dev); 1859 1860 /* sanity check */ 1861 if (!shared_int) 1862 return; 1863 1864 /* status check */ 1865 if (status) { 1866 handle_usb_error(status, __func__, NULL); 1867 return; 1868 } 1869 hso_dbg(0x8, "--- Got intr callback 0x%02X ---\n", status); 1870 1871 /* what request? */ 1872 port_req = urb->transfer_buffer; 1873 hso_dbg(0x8, "port_req = 0x%.2X\n", *port_req); 1874 /* loop over all muxed ports to find the one sending this */ 1875 for (i = 0; i < 8; i++) { 1876 /* max 8 channels on MUX */ 1877 if (*port_req & (1 << i)) { 1878 serial = get_serial_by_shared_int_and_type(shared_int, 1879 (1 << i)); 1880 if (serial != NULL) { 1881 hso_dbg(0x1, "Pending read interrupt on port %d\n", 1882 i); 1883 spin_lock(&serial->serial_lock); 1884 if (serial->rx_state == RX_IDLE && 1885 serial->port.count > 0) { 1886 /* Setup and send a ctrl req read on 1887 * port i */ 1888 if (!serial->rx_urb_filled[0]) { 1889 serial->rx_state = RX_SENT; 1890 hso_mux_serial_read(serial); 1891 } else 1892 serial->rx_state = RX_PENDING; 1893 } else { 1894 hso_dbg(0x1, "Already a read pending on port %d or port not open\n", 1895 i); 1896 } 1897 spin_unlock(&serial->serial_lock); 1898 } 1899 } 1900 } 1901 /* Resubmit interrupt urb */ 1902 hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC); 1903 } 1904 1905 /* called for writing to muxed serial port */ 1906 static int hso_mux_serial_write_data(struct hso_serial *serial) 1907 { 1908 if (NULL == serial) 1909 return -EINVAL; 1910 1911 return mux_device_request(serial, 1912 USB_CDC_SEND_ENCAPSULATED_COMMAND, 1913 serial->parent->port_spec & HSO_PORT_MASK, 1914 serial->tx_urb, 1915 &serial->ctrl_req_tx, 1916 serial->tx_data, serial->tx_data_count); 1917 } 1918 1919 /* write callback for Diag and CS port */ 1920 static void hso_std_serial_write_bulk_callback(struct urb *urb) 1921 { 1922 struct hso_serial *serial = urb->context; 1923 int status = urb->status; 1924 1925 /* sanity check */ 1926 if (!serial) { 1927 hso_dbg(0x1, "serial == NULL\n"); 1928 return; 1929 } 1930 1931 spin_lock(&serial->serial_lock); 1932 serial->tx_urb_used = 0; 1933 spin_unlock(&serial->serial_lock); 1934 if (status) { 1935 handle_usb_error(status, __func__, serial->parent); 1936 return; 1937 } 1938 hso_put_activity(serial->parent); 1939 tty_port_tty_wakeup(&serial->port); 1940 hso_kick_transmit(serial); 1941 1942 hso_dbg(0x1, "\n"); 1943 } 1944 1945 /* called for writing diag or CS serial port */ 1946 static int hso_std_serial_write_data(struct hso_serial *serial) 1947 { 1948 int count = serial->tx_data_count; 1949 int result; 1950 1951 usb_fill_bulk_urb(serial->tx_urb, 1952 serial->parent->usb, 1953 usb_sndbulkpipe(serial->parent->usb, 1954 serial->out_endp-> 1955 bEndpointAddress & 0x7F), 1956 serial->tx_data, serial->tx_data_count, 1957 hso_std_serial_write_bulk_callback, serial); 1958 1959 result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC); 1960 if (result) { 1961 dev_warn(&serial->parent->usb->dev, 1962 "Failed to submit urb - res %d\n", result); 1963 return result; 1964 } 1965 1966 return count; 1967 } 1968 1969 /* callback after read or write on muxed serial port */ 1970 static void ctrl_callback(struct urb *urb) 1971 { 1972 struct hso_serial *serial = urb->context; 1973 struct usb_ctrlrequest *req; 1974 int status = urb->status; 1975 1976 /* sanity check */ 1977 if (!serial) 1978 return; 1979 1980 spin_lock(&serial->serial_lock); 1981 serial->tx_urb_used = 0; 1982 spin_unlock(&serial->serial_lock); 1983 if (status) { 1984 handle_usb_error(status, __func__, serial->parent); 1985 return; 1986 } 1987 1988 /* what request? */ 1989 req = (struct usb_ctrlrequest *)(urb->setup_packet); 1990 hso_dbg(0x8, "--- Got muxed ctrl callback 0x%02X ---\n", status); 1991 hso_dbg(0x8, "Actual length of urb = %d\n", urb->actual_length); 1992 DUMP1(urb->transfer_buffer, urb->actual_length); 1993 1994 if (req->bRequestType == 1995 (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) { 1996 /* response to a read command */ 1997 serial->rx_urb_filled[0] = 1; 1998 spin_lock(&serial->serial_lock); 1999 put_rxbuf_data_and_resubmit_ctrl_urb(serial); 2000 spin_unlock(&serial->serial_lock); 2001 } else { 2002 hso_put_activity(serial->parent); 2003 tty_port_tty_wakeup(&serial->port); 2004 /* response to a write command */ 2005 hso_kick_transmit(serial); 2006 } 2007 } 2008 2009 /* handle RX data for serial port */ 2010 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial) 2011 { 2012 struct tty_struct *tty; 2013 int count; 2014 2015 /* Sanity check */ 2016 if (urb == NULL || serial == NULL) { 2017 hso_dbg(0x1, "serial = NULL\n"); 2018 return -2; 2019 } 2020 2021 tty = tty_port_tty_get(&serial->port); 2022 2023 if (tty && tty_throttled(tty)) { 2024 tty_kref_put(tty); 2025 return -1; 2026 } 2027 2028 /* Push data to tty */ 2029 hso_dbg(0x1, "data to push to tty\n"); 2030 count = tty_buffer_request_room(&serial->port, urb->actual_length); 2031 if (count >= urb->actual_length) { 2032 tty_insert_flip_string(&serial->port, urb->transfer_buffer, 2033 urb->actual_length); 2034 tty_flip_buffer_push(&serial->port); 2035 } else { 2036 dev_warn(&serial->parent->usb->dev, 2037 "dropping data, %d bytes lost\n", urb->actual_length); 2038 } 2039 2040 tty_kref_put(tty); 2041 2042 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0; 2043 2044 return 0; 2045 } 2046 2047 2048 /* Base driver functions */ 2049 2050 static void hso_log_port(struct hso_device *hso_dev) 2051 { 2052 char *port_type; 2053 char port_dev[20]; 2054 2055 switch (hso_dev->port_spec & HSO_PORT_MASK) { 2056 case HSO_PORT_CONTROL: 2057 port_type = "Control"; 2058 break; 2059 case HSO_PORT_APP: 2060 port_type = "Application"; 2061 break; 2062 case HSO_PORT_GPS: 2063 port_type = "GPS"; 2064 break; 2065 case HSO_PORT_GPS_CONTROL: 2066 port_type = "GPS control"; 2067 break; 2068 case HSO_PORT_APP2: 2069 port_type = "Application2"; 2070 break; 2071 case HSO_PORT_PCSC: 2072 port_type = "PCSC"; 2073 break; 2074 case HSO_PORT_DIAG: 2075 port_type = "Diagnostic"; 2076 break; 2077 case HSO_PORT_DIAG2: 2078 port_type = "Diagnostic2"; 2079 break; 2080 case HSO_PORT_MODEM: 2081 port_type = "Modem"; 2082 break; 2083 case HSO_PORT_NETWORK: 2084 port_type = "Network"; 2085 break; 2086 default: 2087 port_type = "Unknown"; 2088 break; 2089 } 2090 if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2091 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name); 2092 } else 2093 sprintf(port_dev, "/dev/%s%d", tty_filename, 2094 dev2ser(hso_dev)->minor); 2095 2096 dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n", 2097 port_type, port_dev); 2098 } 2099 2100 static int hso_start_net_device(struct hso_device *hso_dev) 2101 { 2102 int i, result = 0; 2103 struct hso_net *hso_net = dev2net(hso_dev); 2104 2105 if (!hso_net) 2106 return -ENODEV; 2107 2108 /* send URBs for all read buffers */ 2109 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2110 2111 /* Prep a receive URB */ 2112 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i], 2113 hso_dev->usb, 2114 usb_rcvbulkpipe(hso_dev->usb, 2115 hso_net->in_endp-> 2116 bEndpointAddress & 0x7F), 2117 hso_net->mux_bulk_rx_buf_pool[i], 2118 MUX_BULK_RX_BUF_SIZE, read_bulk_callback, 2119 hso_net); 2120 2121 /* Put it out there so the device can send us stuff */ 2122 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i], 2123 GFP_NOIO); 2124 if (result) 2125 dev_warn(&hso_dev->usb->dev, 2126 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__, 2127 i, result); 2128 } 2129 2130 return result; 2131 } 2132 2133 static int hso_stop_net_device(struct hso_device *hso_dev) 2134 { 2135 int i; 2136 struct hso_net *hso_net = dev2net(hso_dev); 2137 2138 if (!hso_net) 2139 return -ENODEV; 2140 2141 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2142 if (hso_net->mux_bulk_rx_urb_pool[i]) 2143 usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2144 2145 } 2146 if (hso_net->mux_bulk_tx_urb) 2147 usb_kill_urb(hso_net->mux_bulk_tx_urb); 2148 2149 return 0; 2150 } 2151 2152 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags) 2153 { 2154 int i, result = 0; 2155 struct hso_serial *serial = dev2ser(hso_dev); 2156 2157 if (!serial) 2158 return -ENODEV; 2159 2160 /* If it is not the MUX port fill in and submit a bulk urb (already 2161 * allocated in hso_serial_start) */ 2162 if (!(serial->parent->port_spec & HSO_INTF_MUX)) { 2163 for (i = 0; i < serial->num_rx_urbs; i++) { 2164 usb_fill_bulk_urb(serial->rx_urb[i], 2165 serial->parent->usb, 2166 usb_rcvbulkpipe(serial->parent->usb, 2167 serial->in_endp-> 2168 bEndpointAddress & 2169 0x7F), 2170 serial->rx_data[i], 2171 serial->rx_data_length, 2172 hso_std_serial_read_bulk_callback, 2173 serial); 2174 result = usb_submit_urb(serial->rx_urb[i], flags); 2175 if (result) { 2176 dev_warn(&serial->parent->usb->dev, 2177 "Failed to submit urb - res %d\n", 2178 result); 2179 break; 2180 } 2181 } 2182 } else { 2183 mutex_lock(&serial->shared_int->shared_int_lock); 2184 if (!serial->shared_int->use_count) { 2185 result = 2186 hso_mux_submit_intr_urb(serial->shared_int, 2187 hso_dev->usb, flags); 2188 } 2189 serial->shared_int->use_count++; 2190 mutex_unlock(&serial->shared_int->shared_int_lock); 2191 } 2192 if (serial->tiocmget) 2193 tiocmget_submit_urb(serial, 2194 serial->tiocmget, 2195 serial->parent->usb); 2196 return result; 2197 } 2198 2199 static int hso_stop_serial_device(struct hso_device *hso_dev) 2200 { 2201 int i; 2202 struct hso_serial *serial = dev2ser(hso_dev); 2203 struct hso_tiocmget *tiocmget; 2204 2205 if (!serial) 2206 return -ENODEV; 2207 2208 for (i = 0; i < serial->num_rx_urbs; i++) { 2209 if (serial->rx_urb[i]) { 2210 usb_kill_urb(serial->rx_urb[i]); 2211 serial->rx_urb_filled[i] = 0; 2212 } 2213 } 2214 serial->curr_rx_urb_idx = 0; 2215 2216 if (serial->tx_urb) 2217 usb_kill_urb(serial->tx_urb); 2218 2219 if (serial->shared_int) { 2220 mutex_lock(&serial->shared_int->shared_int_lock); 2221 if (serial->shared_int->use_count && 2222 (--serial->shared_int->use_count == 0)) { 2223 struct urb *urb; 2224 2225 urb = serial->shared_int->shared_intr_urb; 2226 if (urb) 2227 usb_kill_urb(urb); 2228 } 2229 mutex_unlock(&serial->shared_int->shared_int_lock); 2230 } 2231 tiocmget = serial->tiocmget; 2232 if (tiocmget) { 2233 wake_up_interruptible(&tiocmget->waitq); 2234 usb_kill_urb(tiocmget->urb); 2235 } 2236 2237 return 0; 2238 } 2239 2240 static void hso_serial_tty_unregister(struct hso_serial *serial) 2241 { 2242 tty_unregister_device(tty_drv, serial->minor); 2243 } 2244 2245 static void hso_serial_common_free(struct hso_serial *serial) 2246 { 2247 int i; 2248 2249 for (i = 0; i < serial->num_rx_urbs; i++) { 2250 /* unlink and free RX URB */ 2251 usb_free_urb(serial->rx_urb[i]); 2252 /* free the RX buffer */ 2253 kfree(serial->rx_data[i]); 2254 } 2255 2256 /* unlink and free TX URB */ 2257 usb_free_urb(serial->tx_urb); 2258 kfree(serial->tx_buffer); 2259 kfree(serial->tx_data); 2260 tty_port_destroy(&serial->port); 2261 } 2262 2263 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, 2264 int rx_size, int tx_size) 2265 { 2266 struct device *dev; 2267 int minor; 2268 int i; 2269 2270 tty_port_init(&serial->port); 2271 2272 minor = get_free_serial_index(); 2273 if (minor < 0) 2274 goto exit; 2275 2276 /* register our minor number */ 2277 serial->parent->dev = tty_port_register_device_attr(&serial->port, 2278 tty_drv, minor, &serial->parent->interface->dev, 2279 serial->parent, hso_serial_dev_groups); 2280 dev = serial->parent->dev; 2281 2282 /* fill in specific data for later use */ 2283 serial->minor = minor; 2284 serial->magic = HSO_SERIAL_MAGIC; 2285 spin_lock_init(&serial->serial_lock); 2286 serial->num_rx_urbs = num_urbs; 2287 2288 /* RX, allocate urb and initialize */ 2289 2290 /* prepare our RX buffer */ 2291 serial->rx_data_length = rx_size; 2292 for (i = 0; i < serial->num_rx_urbs; i++) { 2293 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 2294 if (!serial->rx_urb[i]) 2295 goto exit; 2296 serial->rx_urb[i]->transfer_buffer = NULL; 2297 serial->rx_urb[i]->transfer_buffer_length = 0; 2298 serial->rx_data[i] = kzalloc(serial->rx_data_length, 2299 GFP_KERNEL); 2300 if (!serial->rx_data[i]) 2301 goto exit; 2302 } 2303 2304 /* TX, allocate urb and initialize */ 2305 serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2306 if (!serial->tx_urb) 2307 goto exit; 2308 serial->tx_urb->transfer_buffer = NULL; 2309 serial->tx_urb->transfer_buffer_length = 0; 2310 /* prepare our TX buffer */ 2311 serial->tx_data_count = 0; 2312 serial->tx_buffer_count = 0; 2313 serial->tx_data_length = tx_size; 2314 serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL); 2315 if (!serial->tx_data) 2316 goto exit; 2317 2318 serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL); 2319 if (!serial->tx_buffer) 2320 goto exit; 2321 2322 return 0; 2323 exit: 2324 hso_serial_tty_unregister(serial); 2325 hso_serial_common_free(serial); 2326 return -1; 2327 } 2328 2329 /* Creates a general hso device */ 2330 static struct hso_device *hso_create_device(struct usb_interface *intf, 2331 int port_spec) 2332 { 2333 struct hso_device *hso_dev; 2334 2335 hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC); 2336 if (!hso_dev) 2337 return NULL; 2338 2339 hso_dev->port_spec = port_spec; 2340 hso_dev->usb = interface_to_usbdev(intf); 2341 hso_dev->interface = intf; 2342 kref_init(&hso_dev->ref); 2343 mutex_init(&hso_dev->mutex); 2344 2345 INIT_WORK(&hso_dev->async_get_intf, async_get_intf); 2346 INIT_WORK(&hso_dev->async_put_intf, async_put_intf); 2347 2348 return hso_dev; 2349 } 2350 2351 /* Removes a network device in the network device table */ 2352 static int remove_net_device(struct hso_device *hso_dev) 2353 { 2354 int i; 2355 2356 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2357 if (network_table[i] == hso_dev) { 2358 network_table[i] = NULL; 2359 break; 2360 } 2361 } 2362 if (i == HSO_MAX_NET_DEVICES) 2363 return -1; 2364 return 0; 2365 } 2366 2367 /* Frees our network device */ 2368 static void hso_free_net_device(struct hso_device *hso_dev) 2369 { 2370 int i; 2371 struct hso_net *hso_net = dev2net(hso_dev); 2372 2373 if (!hso_net) 2374 return; 2375 2376 remove_net_device(hso_net->parent); 2377 2378 if (hso_net->net) 2379 unregister_netdev(hso_net->net); 2380 2381 /* start freeing */ 2382 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2383 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]); 2384 kfree(hso_net->mux_bulk_rx_buf_pool[i]); 2385 hso_net->mux_bulk_rx_buf_pool[i] = NULL; 2386 } 2387 usb_free_urb(hso_net->mux_bulk_tx_urb); 2388 kfree(hso_net->mux_bulk_tx_buf); 2389 hso_net->mux_bulk_tx_buf = NULL; 2390 2391 if (hso_net->net) 2392 free_netdev(hso_net->net); 2393 2394 kfree(hso_dev); 2395 } 2396 2397 static const struct net_device_ops hso_netdev_ops = { 2398 .ndo_open = hso_net_open, 2399 .ndo_stop = hso_net_close, 2400 .ndo_start_xmit = hso_net_start_xmit, 2401 .ndo_tx_timeout = hso_net_tx_timeout, 2402 }; 2403 2404 /* initialize the network interface */ 2405 static void hso_net_init(struct net_device *net) 2406 { 2407 struct hso_net *hso_net = netdev_priv(net); 2408 2409 hso_dbg(0x1, "sizeof hso_net is %zu\n", sizeof(*hso_net)); 2410 2411 /* fill in the other fields */ 2412 net->netdev_ops = &hso_netdev_ops; 2413 net->watchdog_timeo = HSO_NET_TX_TIMEOUT; 2414 net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; 2415 net->type = ARPHRD_NONE; 2416 net->mtu = DEFAULT_MTU - 14; 2417 net->tx_queue_len = 10; 2418 net->ethtool_ops = &ops; 2419 2420 /* and initialize the semaphore */ 2421 spin_lock_init(&hso_net->net_lock); 2422 } 2423 2424 /* Adds a network device in the network device table */ 2425 static int add_net_device(struct hso_device *hso_dev) 2426 { 2427 int i; 2428 2429 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 2430 if (network_table[i] == NULL) { 2431 network_table[i] = hso_dev; 2432 break; 2433 } 2434 } 2435 if (i == HSO_MAX_NET_DEVICES) 2436 return -1; 2437 return 0; 2438 } 2439 2440 static int hso_rfkill_set_block(void *data, bool blocked) 2441 { 2442 struct hso_device *hso_dev = data; 2443 int enabled = !blocked; 2444 int rv; 2445 2446 mutex_lock(&hso_dev->mutex); 2447 if (hso_dev->usb_gone) 2448 rv = 0; 2449 else 2450 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0), 2451 enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0, 2452 USB_CTRL_SET_TIMEOUT); 2453 mutex_unlock(&hso_dev->mutex); 2454 return rv; 2455 } 2456 2457 static const struct rfkill_ops hso_rfkill_ops = { 2458 .set_block = hso_rfkill_set_block, 2459 }; 2460 2461 /* Creates and sets up everything for rfkill */ 2462 static void hso_create_rfkill(struct hso_device *hso_dev, 2463 struct usb_interface *interface) 2464 { 2465 struct hso_net *hso_net = dev2net(hso_dev); 2466 struct device *dev = &hso_net->net->dev; 2467 static u32 rfkill_counter; 2468 2469 snprintf(hso_net->name, sizeof(hso_net->name), "hso-%d", 2470 rfkill_counter++); 2471 2472 hso_net->rfkill = rfkill_alloc(hso_net->name, 2473 &interface_to_usbdev(interface)->dev, 2474 RFKILL_TYPE_WWAN, 2475 &hso_rfkill_ops, hso_dev); 2476 if (!hso_net->rfkill) { 2477 dev_err(dev, "%s - Out of memory\n", __func__); 2478 return; 2479 } 2480 if (rfkill_register(hso_net->rfkill) < 0) { 2481 rfkill_destroy(hso_net->rfkill); 2482 hso_net->rfkill = NULL; 2483 dev_err(dev, "%s - Failed to register rfkill\n", __func__); 2484 return; 2485 } 2486 } 2487 2488 static struct device_type hso_type = { 2489 .name = "wwan", 2490 }; 2491 2492 /* Creates our network device */ 2493 static struct hso_device *hso_create_net_device(struct usb_interface *interface, 2494 int port_spec) 2495 { 2496 int result, i; 2497 struct net_device *net; 2498 struct hso_net *hso_net; 2499 struct hso_device *hso_dev; 2500 2501 hso_dev = hso_create_device(interface, port_spec); 2502 if (!hso_dev) 2503 return NULL; 2504 2505 /* allocate our network device, then we can put in our private data */ 2506 /* call hso_net_init to do the basic initialization */ 2507 net = alloc_netdev(sizeof(struct hso_net), "hso%d", NET_NAME_UNKNOWN, 2508 hso_net_init); 2509 if (!net) { 2510 dev_err(&interface->dev, "Unable to create ethernet device\n"); 2511 goto exit; 2512 } 2513 2514 hso_net = netdev_priv(net); 2515 2516 hso_dev->port_data.dev_net = hso_net; 2517 hso_net->net = net; 2518 hso_net->parent = hso_dev; 2519 2520 hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2521 USB_DIR_IN); 2522 if (!hso_net->in_endp) { 2523 dev_err(&interface->dev, "Can't find BULK IN endpoint\n"); 2524 goto exit; 2525 } 2526 hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2527 USB_DIR_OUT); 2528 if (!hso_net->out_endp) { 2529 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n"); 2530 goto exit; 2531 } 2532 SET_NETDEV_DEV(net, &interface->dev); 2533 SET_NETDEV_DEVTYPE(net, &hso_type); 2534 2535 /* start allocating */ 2536 for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) { 2537 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL); 2538 if (!hso_net->mux_bulk_rx_urb_pool[i]) 2539 goto exit; 2540 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE, 2541 GFP_KERNEL); 2542 if (!hso_net->mux_bulk_rx_buf_pool[i]) 2543 goto exit; 2544 } 2545 hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL); 2546 if (!hso_net->mux_bulk_tx_urb) 2547 goto exit; 2548 hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL); 2549 if (!hso_net->mux_bulk_tx_buf) 2550 goto exit; 2551 2552 add_net_device(hso_dev); 2553 2554 /* registering our net device */ 2555 result = register_netdev(net); 2556 if (result) { 2557 dev_err(&interface->dev, "Failed to register device\n"); 2558 goto exit; 2559 } 2560 2561 hso_log_port(hso_dev); 2562 2563 hso_create_rfkill(hso_dev, interface); 2564 2565 return hso_dev; 2566 exit: 2567 hso_free_net_device(hso_dev); 2568 return NULL; 2569 } 2570 2571 static void hso_free_tiomget(struct hso_serial *serial) 2572 { 2573 struct hso_tiocmget *tiocmget; 2574 if (!serial) 2575 return; 2576 tiocmget = serial->tiocmget; 2577 if (tiocmget) { 2578 usb_free_urb(tiocmget->urb); 2579 tiocmget->urb = NULL; 2580 serial->tiocmget = NULL; 2581 kfree(tiocmget); 2582 } 2583 } 2584 2585 /* Frees an AT channel ( goes for both mux and non-mux ) */ 2586 static void hso_free_serial_device(struct hso_device *hso_dev) 2587 { 2588 struct hso_serial *serial = dev2ser(hso_dev); 2589 2590 if (!serial) 2591 return; 2592 2593 hso_serial_common_free(serial); 2594 2595 if (serial->shared_int) { 2596 mutex_lock(&serial->shared_int->shared_int_lock); 2597 if (--serial->shared_int->ref_count == 0) 2598 hso_free_shared_int(serial->shared_int); 2599 else 2600 mutex_unlock(&serial->shared_int->shared_int_lock); 2601 } 2602 hso_free_tiomget(serial); 2603 kfree(serial); 2604 kfree(hso_dev); 2605 } 2606 2607 /* Creates a bulk AT channel */ 2608 static struct hso_device *hso_create_bulk_serial_device( 2609 struct usb_interface *interface, int port) 2610 { 2611 struct hso_device *hso_dev; 2612 struct hso_serial *serial; 2613 int num_urbs; 2614 struct hso_tiocmget *tiocmget; 2615 2616 hso_dev = hso_create_device(interface, port); 2617 if (!hso_dev) 2618 return NULL; 2619 2620 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2621 if (!serial) 2622 goto exit; 2623 2624 serial->parent = hso_dev; 2625 hso_dev->port_data.dev_serial = serial; 2626 2627 if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) { 2628 num_urbs = 2; 2629 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget), 2630 GFP_KERNEL); 2631 /* it isn't going to break our heart if serial->tiocmget 2632 * allocation fails don't bother checking this. 2633 */ 2634 if (serial->tiocmget) { 2635 tiocmget = serial->tiocmget; 2636 tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL); 2637 if (tiocmget->urb) { 2638 mutex_init(&tiocmget->mutex); 2639 init_waitqueue_head(&tiocmget->waitq); 2640 tiocmget->endp = hso_get_ep( 2641 interface, 2642 USB_ENDPOINT_XFER_INT, 2643 USB_DIR_IN); 2644 } else 2645 hso_free_tiomget(serial); 2646 } 2647 } 2648 else 2649 num_urbs = 1; 2650 2651 if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE, 2652 BULK_URB_TX_SIZE)) 2653 goto exit; 2654 2655 serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, 2656 USB_DIR_IN); 2657 if (!serial->in_endp) { 2658 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2659 goto exit2; 2660 } 2661 2662 if (! 2663 (serial->out_endp = 2664 hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) { 2665 dev_err(&interface->dev, "Failed to find BULK IN ep\n"); 2666 goto exit2; 2667 } 2668 2669 serial->write_data = hso_std_serial_write_data; 2670 2671 /* and record this serial */ 2672 set_serial_by_index(serial->minor, serial); 2673 2674 /* setup the proc dirs and files if needed */ 2675 hso_log_port(hso_dev); 2676 2677 /* done, return it */ 2678 return hso_dev; 2679 2680 exit2: 2681 hso_serial_tty_unregister(serial); 2682 hso_serial_common_free(serial); 2683 exit: 2684 hso_free_tiomget(serial); 2685 kfree(serial); 2686 kfree(hso_dev); 2687 return NULL; 2688 } 2689 2690 /* Creates a multiplexed AT channel */ 2691 static 2692 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, 2693 int port, 2694 struct hso_shared_int *mux) 2695 { 2696 struct hso_device *hso_dev; 2697 struct hso_serial *serial; 2698 int port_spec; 2699 2700 port_spec = HSO_INTF_MUX; 2701 port_spec &= ~HSO_PORT_MASK; 2702 2703 port_spec |= hso_mux_to_port(port); 2704 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT) 2705 return NULL; 2706 2707 hso_dev = hso_create_device(interface, port_spec); 2708 if (!hso_dev) 2709 return NULL; 2710 2711 serial = kzalloc(sizeof(*serial), GFP_KERNEL); 2712 if (!serial) 2713 goto exit; 2714 2715 hso_dev->port_data.dev_serial = serial; 2716 serial->parent = hso_dev; 2717 2718 if (hso_serial_common_create 2719 (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) 2720 goto exit; 2721 2722 serial->tx_data_length--; 2723 serial->write_data = hso_mux_serial_write_data; 2724 2725 serial->shared_int = mux; 2726 mutex_lock(&serial->shared_int->shared_int_lock); 2727 serial->shared_int->ref_count++; 2728 mutex_unlock(&serial->shared_int->shared_int_lock); 2729 2730 /* and record this serial */ 2731 set_serial_by_index(serial->minor, serial); 2732 2733 /* setup the proc dirs and files if needed */ 2734 hso_log_port(hso_dev); 2735 2736 /* done, return it */ 2737 return hso_dev; 2738 2739 exit: 2740 if (serial) { 2741 tty_unregister_device(tty_drv, serial->minor); 2742 kfree(serial); 2743 } 2744 kfree(hso_dev); 2745 return NULL; 2746 2747 } 2748 2749 static void hso_free_shared_int(struct hso_shared_int *mux) 2750 { 2751 usb_free_urb(mux->shared_intr_urb); 2752 kfree(mux->shared_intr_buf); 2753 mutex_unlock(&mux->shared_int_lock); 2754 kfree(mux); 2755 } 2756 2757 static 2758 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface) 2759 { 2760 struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL); 2761 2762 if (!mux) 2763 return NULL; 2764 2765 mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT, 2766 USB_DIR_IN); 2767 if (!mux->intr_endp) { 2768 dev_err(&interface->dev, "Can't find INT IN endpoint\n"); 2769 goto exit; 2770 } 2771 2772 mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL); 2773 if (!mux->shared_intr_urb) 2774 goto exit; 2775 mux->shared_intr_buf = 2776 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize), 2777 GFP_KERNEL); 2778 if (!mux->shared_intr_buf) 2779 goto exit; 2780 2781 mutex_init(&mux->shared_int_lock); 2782 2783 return mux; 2784 2785 exit: 2786 kfree(mux->shared_intr_buf); 2787 usb_free_urb(mux->shared_intr_urb); 2788 kfree(mux); 2789 return NULL; 2790 } 2791 2792 /* Gets the port spec for a certain interface */ 2793 static int hso_get_config_data(struct usb_interface *interface) 2794 { 2795 struct usb_device *usbdev = interface_to_usbdev(interface); 2796 u8 *config_data = kmalloc(17, GFP_KERNEL); 2797 u32 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2798 s32 result; 2799 2800 if (!config_data) 2801 return -ENOMEM; 2802 if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 2803 0x86, 0xC0, 0, 0, config_data, 17, 2804 USB_CTRL_SET_TIMEOUT) != 0x11) { 2805 kfree(config_data); 2806 return -EIO; 2807 } 2808 2809 switch (config_data[if_num]) { 2810 case 0x0: 2811 result = 0; 2812 break; 2813 case 0x1: 2814 result = HSO_PORT_DIAG; 2815 break; 2816 case 0x2: 2817 result = HSO_PORT_GPS; 2818 break; 2819 case 0x3: 2820 result = HSO_PORT_GPS_CONTROL; 2821 break; 2822 case 0x4: 2823 result = HSO_PORT_APP; 2824 break; 2825 case 0x5: 2826 result = HSO_PORT_APP2; 2827 break; 2828 case 0x6: 2829 result = HSO_PORT_CONTROL; 2830 break; 2831 case 0x7: 2832 result = HSO_PORT_NETWORK; 2833 break; 2834 case 0x8: 2835 result = HSO_PORT_MODEM; 2836 break; 2837 case 0x9: 2838 result = HSO_PORT_MSD; 2839 break; 2840 case 0xa: 2841 result = HSO_PORT_PCSC; 2842 break; 2843 case 0xb: 2844 result = HSO_PORT_VOICE; 2845 break; 2846 default: 2847 result = 0; 2848 } 2849 2850 if (result) 2851 result |= HSO_INTF_BULK; 2852 2853 if (config_data[16] & 0x1) 2854 result |= HSO_INFO_CRC_BUG; 2855 2856 kfree(config_data); 2857 return result; 2858 } 2859 2860 /* called once for each interface upon device insertion */ 2861 static int hso_probe(struct usb_interface *interface, 2862 const struct usb_device_id *id) 2863 { 2864 int mux, i, if_num, port_spec; 2865 unsigned char port_mask; 2866 struct hso_device *hso_dev = NULL; 2867 struct hso_shared_int *shared_int; 2868 struct hso_device *tmp_dev = NULL; 2869 2870 if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) { 2871 dev_err(&interface->dev, "Not our interface\n"); 2872 return -ENODEV; 2873 } 2874 2875 if_num = interface->cur_altsetting->desc.bInterfaceNumber; 2876 2877 /* Get the interface/port specification from either driver_info or from 2878 * the device itself */ 2879 if (id->driver_info) 2880 port_spec = ((u32 *)(id->driver_info))[if_num]; 2881 else 2882 port_spec = hso_get_config_data(interface); 2883 2884 /* Check if we need to switch to alt interfaces prior to port 2885 * configuration */ 2886 if (interface->num_altsetting > 1) 2887 usb_set_interface(interface_to_usbdev(interface), if_num, 1); 2888 interface->needs_remote_wakeup = 1; 2889 2890 /* Allocate new hso device(s) */ 2891 switch (port_spec & HSO_INTF_MASK) { 2892 case HSO_INTF_MUX: 2893 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2894 /* Create the network device */ 2895 if (!disable_net) { 2896 hso_dev = hso_create_net_device(interface, 2897 port_spec); 2898 if (!hso_dev) 2899 goto exit; 2900 tmp_dev = hso_dev; 2901 } 2902 } 2903 2904 if (hso_get_mux_ports(interface, &port_mask)) 2905 /* TODO: de-allocate everything */ 2906 goto exit; 2907 2908 shared_int = hso_create_shared_int(interface); 2909 if (!shared_int) 2910 goto exit; 2911 2912 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) { 2913 if (port_mask & i) { 2914 hso_dev = hso_create_mux_serial_device( 2915 interface, i, shared_int); 2916 if (!hso_dev) 2917 goto exit; 2918 } 2919 } 2920 2921 if (tmp_dev) 2922 hso_dev = tmp_dev; 2923 break; 2924 2925 case HSO_INTF_BULK: 2926 /* It's a regular bulk interface */ 2927 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) { 2928 if (!disable_net) 2929 hso_dev = 2930 hso_create_net_device(interface, port_spec); 2931 } else { 2932 hso_dev = 2933 hso_create_bulk_serial_device(interface, port_spec); 2934 } 2935 if (!hso_dev) 2936 goto exit; 2937 break; 2938 default: 2939 goto exit; 2940 } 2941 2942 /* save our data pointer in this device */ 2943 usb_set_intfdata(interface, hso_dev); 2944 2945 /* done */ 2946 return 0; 2947 exit: 2948 hso_free_interface(interface); 2949 return -ENODEV; 2950 } 2951 2952 /* device removed, cleaning up */ 2953 static void hso_disconnect(struct usb_interface *interface) 2954 { 2955 hso_free_interface(interface); 2956 2957 /* remove reference of our private data */ 2958 usb_set_intfdata(interface, NULL); 2959 } 2960 2961 static void async_get_intf(struct work_struct *data) 2962 { 2963 struct hso_device *hso_dev = 2964 container_of(data, struct hso_device, async_get_intf); 2965 usb_autopm_get_interface(hso_dev->interface); 2966 } 2967 2968 static void async_put_intf(struct work_struct *data) 2969 { 2970 struct hso_device *hso_dev = 2971 container_of(data, struct hso_device, async_put_intf); 2972 usb_autopm_put_interface(hso_dev->interface); 2973 } 2974 2975 static int hso_get_activity(struct hso_device *hso_dev) 2976 { 2977 if (hso_dev->usb->state == USB_STATE_SUSPENDED) { 2978 if (!hso_dev->is_active) { 2979 hso_dev->is_active = 1; 2980 schedule_work(&hso_dev->async_get_intf); 2981 } 2982 } 2983 2984 if (hso_dev->usb->state != USB_STATE_CONFIGURED) 2985 return -EAGAIN; 2986 2987 usb_mark_last_busy(hso_dev->usb); 2988 2989 return 0; 2990 } 2991 2992 static int hso_put_activity(struct hso_device *hso_dev) 2993 { 2994 if (hso_dev->usb->state != USB_STATE_SUSPENDED) { 2995 if (hso_dev->is_active) { 2996 hso_dev->is_active = 0; 2997 schedule_work(&hso_dev->async_put_intf); 2998 return -EAGAIN; 2999 } 3000 } 3001 hso_dev->is_active = 0; 3002 return 0; 3003 } 3004 3005 /* called by kernel when we need to suspend device */ 3006 static int hso_suspend(struct usb_interface *iface, pm_message_t message) 3007 { 3008 int i, result; 3009 3010 /* Stop all serial ports */ 3011 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3012 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3013 result = hso_stop_serial_device(serial_table[i]); 3014 if (result) 3015 goto out; 3016 } 3017 } 3018 3019 /* Stop all network ports */ 3020 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3021 if (network_table[i] && 3022 (network_table[i]->interface == iface)) { 3023 result = hso_stop_net_device(network_table[i]); 3024 if (result) 3025 goto out; 3026 } 3027 } 3028 3029 out: 3030 return 0; 3031 } 3032 3033 /* called by kernel when we need to resume device */ 3034 static int hso_resume(struct usb_interface *iface) 3035 { 3036 int i, result = 0; 3037 struct hso_net *hso_net; 3038 3039 /* Start all serial ports */ 3040 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3041 if (serial_table[i] && (serial_table[i]->interface == iface)) { 3042 if (dev2ser(serial_table[i])->port.count) { 3043 result = 3044 hso_start_serial_device(serial_table[i], GFP_NOIO); 3045 hso_kick_transmit(dev2ser(serial_table[i])); 3046 if (result) 3047 goto out; 3048 } 3049 } 3050 } 3051 3052 /* Start all network ports */ 3053 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3054 if (network_table[i] && 3055 (network_table[i]->interface == iface)) { 3056 hso_net = dev2net(network_table[i]); 3057 if (hso_net->flags & IFF_UP) { 3058 /* First transmit any lingering data, 3059 then restart the device. */ 3060 if (hso_net->skb_tx_buf) { 3061 dev_dbg(&iface->dev, 3062 "Transmitting" 3063 " lingering data\n"); 3064 hso_net_start_xmit(hso_net->skb_tx_buf, 3065 hso_net->net); 3066 hso_net->skb_tx_buf = NULL; 3067 } 3068 result = hso_start_net_device(network_table[i]); 3069 if (result) 3070 goto out; 3071 } 3072 } 3073 } 3074 3075 out: 3076 return result; 3077 } 3078 3079 static void hso_serial_ref_free(struct kref *ref) 3080 { 3081 struct hso_device *hso_dev = container_of(ref, struct hso_device, ref); 3082 3083 hso_free_serial_device(hso_dev); 3084 } 3085 3086 static void hso_free_interface(struct usb_interface *interface) 3087 { 3088 struct hso_serial *serial; 3089 int i; 3090 3091 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) { 3092 if (serial_table[i] && 3093 (serial_table[i]->interface == interface)) { 3094 serial = dev2ser(serial_table[i]); 3095 tty_port_tty_hangup(&serial->port, false); 3096 mutex_lock(&serial->parent->mutex); 3097 serial->parent->usb_gone = 1; 3098 mutex_unlock(&serial->parent->mutex); 3099 cancel_work_sync(&serial_table[i]->async_put_intf); 3100 cancel_work_sync(&serial_table[i]->async_get_intf); 3101 hso_serial_tty_unregister(serial); 3102 kref_put(&serial_table[i]->ref, hso_serial_ref_free); 3103 set_serial_by_index(i, NULL); 3104 } 3105 } 3106 3107 for (i = 0; i < HSO_MAX_NET_DEVICES; i++) { 3108 if (network_table[i] && 3109 (network_table[i]->interface == interface)) { 3110 struct rfkill *rfk = dev2net(network_table[i])->rfkill; 3111 /* hso_stop_net_device doesn't stop the net queue since 3112 * traffic needs to start it again when suspended */ 3113 netif_stop_queue(dev2net(network_table[i])->net); 3114 hso_stop_net_device(network_table[i]); 3115 cancel_work_sync(&network_table[i]->async_put_intf); 3116 cancel_work_sync(&network_table[i]->async_get_intf); 3117 if (rfk) { 3118 rfkill_unregister(rfk); 3119 rfkill_destroy(rfk); 3120 } 3121 hso_free_net_device(network_table[i]); 3122 } 3123 } 3124 } 3125 3126 /* Helper functions */ 3127 3128 /* Get the endpoint ! */ 3129 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf, 3130 int type, int dir) 3131 { 3132 int i; 3133 struct usb_host_interface *iface = intf->cur_altsetting; 3134 struct usb_endpoint_descriptor *endp; 3135 3136 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3137 endp = &iface->endpoint[i].desc; 3138 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) && 3139 (usb_endpoint_type(endp) == type)) 3140 return endp; 3141 } 3142 3143 return NULL; 3144 } 3145 3146 /* Get the byte that describes which ports are enabled */ 3147 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports) 3148 { 3149 int i; 3150 struct usb_host_interface *iface = intf->cur_altsetting; 3151 3152 if (iface->extralen == 3) { 3153 *ports = iface->extra[2]; 3154 return 0; 3155 } 3156 3157 for (i = 0; i < iface->desc.bNumEndpoints; i++) { 3158 if (iface->endpoint[i].extralen == 3) { 3159 *ports = iface->endpoint[i].extra[2]; 3160 return 0; 3161 } 3162 } 3163 3164 return -1; 3165 } 3166 3167 /* interrupt urb needs to be submitted, used for serial read of muxed port */ 3168 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int, 3169 struct usb_device *usb, gfp_t gfp) 3170 { 3171 int result; 3172 3173 usb_fill_int_urb(shared_int->shared_intr_urb, usb, 3174 usb_rcvintpipe(usb, 3175 shared_int->intr_endp->bEndpointAddress & 0x7F), 3176 shared_int->shared_intr_buf, 3177 1, 3178 intr_callback, shared_int, 3179 shared_int->intr_endp->bInterval); 3180 3181 result = usb_submit_urb(shared_int->shared_intr_urb, gfp); 3182 if (result) 3183 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__, 3184 result); 3185 3186 return result; 3187 } 3188 3189 /* operations setup of the serial interface */ 3190 static const struct tty_operations hso_serial_ops = { 3191 .open = hso_serial_open, 3192 .close = hso_serial_close, 3193 .write = hso_serial_write, 3194 .write_room = hso_serial_write_room, 3195 .cleanup = hso_serial_cleanup, 3196 .ioctl = hso_serial_ioctl, 3197 .set_termios = hso_serial_set_termios, 3198 .chars_in_buffer = hso_serial_chars_in_buffer, 3199 .tiocmget = hso_serial_tiocmget, 3200 .tiocmset = hso_serial_tiocmset, 3201 .get_icount = hso_get_count, 3202 .unthrottle = hso_unthrottle 3203 }; 3204 3205 static struct usb_driver hso_driver = { 3206 .name = driver_name, 3207 .probe = hso_probe, 3208 .disconnect = hso_disconnect, 3209 .id_table = hso_ids, 3210 .suspend = hso_suspend, 3211 .resume = hso_resume, 3212 .reset_resume = hso_resume, 3213 .supports_autosuspend = 1, 3214 .disable_hub_initiated_lpm = 1, 3215 }; 3216 3217 static int __init hso_init(void) 3218 { 3219 int i; 3220 int result; 3221 3222 /* put it in the log */ 3223 pr_info("%s\n", version); 3224 3225 /* Initialise the serial table semaphore and table */ 3226 spin_lock_init(&serial_table_lock); 3227 for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) 3228 serial_table[i] = NULL; 3229 3230 /* allocate our driver using the proper amount of supported minors */ 3231 tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS); 3232 if (!tty_drv) 3233 return -ENOMEM; 3234 3235 /* fill in all needed values */ 3236 tty_drv->driver_name = driver_name; 3237 tty_drv->name = tty_filename; 3238 3239 /* if major number is provided as parameter, use that one */ 3240 if (tty_major) 3241 tty_drv->major = tty_major; 3242 3243 tty_drv->minor_start = 0; 3244 tty_drv->type = TTY_DRIVER_TYPE_SERIAL; 3245 tty_drv->subtype = SERIAL_TYPE_NORMAL; 3246 tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 3247 tty_drv->init_termios = tty_std_termios; 3248 hso_init_termios(&tty_drv->init_termios); 3249 tty_set_operations(tty_drv, &hso_serial_ops); 3250 3251 /* register the tty driver */ 3252 result = tty_register_driver(tty_drv); 3253 if (result) { 3254 pr_err("%s - tty_register_driver failed(%d)\n", 3255 __func__, result); 3256 goto err_free_tty; 3257 } 3258 3259 /* register this module as an usb driver */ 3260 result = usb_register(&hso_driver); 3261 if (result) { 3262 pr_err("Could not register hso driver - error: %d\n", result); 3263 goto err_unreg_tty; 3264 } 3265 3266 /* done */ 3267 return 0; 3268 err_unreg_tty: 3269 tty_unregister_driver(tty_drv); 3270 err_free_tty: 3271 put_tty_driver(tty_drv); 3272 return result; 3273 } 3274 3275 static void __exit hso_exit(void) 3276 { 3277 pr_info("unloaded\n"); 3278 3279 tty_unregister_driver(tty_drv); 3280 /* deregister the usb driver */ 3281 usb_deregister(&hso_driver); 3282 put_tty_driver(tty_drv); 3283 } 3284 3285 /* Module definitions */ 3286 module_init(hso_init); 3287 module_exit(hso_exit); 3288 3289 MODULE_AUTHOR(MOD_AUTHOR); 3290 MODULE_DESCRIPTION(MOD_DESCRIPTION); 3291 MODULE_LICENSE(MOD_LICENSE); 3292 3293 /* change the debug level (eg: insmod hso.ko debug=0x04) */ 3294 MODULE_PARM_DESC(debug, "debug level mask [0x01 | 0x02 | 0x04 | 0x08 | 0x10]"); 3295 module_param(debug, int, S_IRUGO | S_IWUSR); 3296 3297 /* set the major tty number (eg: insmod hso.ko tty_major=245) */ 3298 MODULE_PARM_DESC(tty_major, "Set the major tty number"); 3299 module_param(tty_major, int, S_IRUGO | S_IWUSR); 3300 3301 /* disable network interface (eg: insmod hso.ko disable_net=1) */ 3302 MODULE_PARM_DESC(disable_net, "Disable the network interface"); 3303 module_param(disable_net, int, S_IRUGO | S_IWUSR); 3304